May 19 [Day 84] Drizzle and light rain began as I arrived at the parking area at 0915 and persisted to 1120, but the rest of the day provided almost ideal migration conditions. The wind, which was initially S-SE and light, progressively moved to SW and then W steadily increasing in velocity from 20 km/h at 1400 to 30 km/h at 1700 and 40 km/h at 1900; cloud cover after the rain stopped was 70-90% cumulus, altostratus and cirrus giving a perfect viewing backdrop, and the temperature rose to 16C from a starting temperature of 7C. The first raptor migrant, a juvenile Sharp-shinned Hawk, moved by at 1258 and subsequent movement was slow but steady and involved 7 species, with 3 additional non-migrant species seen (Northern Goshawk, Golden Eagle and Prairie Falcon). At 1415, the 2nd Swainson’s Hawk of the season, a light morph adult, moved north above the ridge, and the last 2 birds of the day (and of the count) were an adult Peregrine Falcon at 1736 and a juvenile light morph Broad-winged Hawk at 1843. There were no migrant Golden Eagles and the resident pair was seen occasionally after 1700 with the male still gamely displaying. A Warbling Vireo singing at the parking area, two Chipping Sparrows on the ridge and a Barn Swallow flying over the ridge towards the west at 1535 were all seasonal firsts. The non-raptor highlight of the day, however, was a flock of 21 American White Pelicans soaring over the Crowsnest Valley south of the site at 1233 18 of which slowly made their way up the valley with much soaring finally disappearing behind Turtle Mountain at 1250. The other 3 glided back to the east. It was a good last day of the 2008 spring count! 10.5 hours (975.5) BAEA 1 (453), SSHA 1 (196), COHA 2 (39), BWHA 1 (7), SWHA 1 (2), RTHA 2 (227), PEFA 1 (6) TOTAL 9 (4204)
May summary (compared to 1994-2008 Mount Lorette count averages). We spent 19 days (234.3 hours) in the field during the month and most of the time was spent on the ridge. Four days were significantly affected by inclement weather. The days and hours are 35.7% and 48.5% above average respectively. The combined species count of 339 birds is the second highest RMERF May count (after the 460 atThe South Livingstone Raptor Count for the spring migration of 2008 has now begun. First official day of counting began on 20th February 2008. Follow the daily movement of raptors on this blog updated daily by Peter Sherrington.
Monday, May 19, 2008
Sunday, May 18, 2008
May 18 [Day 83] Although the forecast called for winds of up to 20 km/h, for most of the day winds were gusting between 40 and 60 km/h from the W-WNW, with the temperature ranging from 15C to 20C. The sky was ideal for viewing with 30-80% mainly cumulus and cirrus cloud cover. Raptor movement was surprisingly good starting at 0953 with a juvenile rufous morph calurus Red-tailed Hawk through to a Cooper’s Hawk at 1810 which was the only adult bird seen today. Nine of the day’s 19 migrants moved between 1234 and 1400, and the total of 5 Golden Eagles comprised 2 subadult and 3 juvenile birds. The resident pair of Golden Eagles was seen soaring together with the male still displaying suggesting that she is not nesting, and is unlikely now to do so at this late juncture. A Cassin’s Vireo singing near the site at 1122 was the first of the season, and a Hoary Elfin was a new butterfly species for the site. Because of today’s strong raptor movement I am planning to watch tomorrow but the start may be delayed as I need to catch up on some sleep. 12.67 hours (965) OSPR 1 (21), SSHA 7 (195), COHA 1 (37), NOGO 1 (137), RTHA 4 (225), GOEA 5 (2981) TOTAL 19 (4195)
Saturday, May 17, 2008
May 17 [Day 82] This was the warmest day yet with a high of 23.5C from a low of 14C. Light westerly winds prevailed until 1100 when they progressively increased in velocity and changed to WNW after 1400: by the end of the day they were gusting to 45 km/h. Cloud cover was 60-90% mainly altostratus and cirrus all day. Apart from a juvenile Northern Goshawk at 0824 all the raptor movement was after 1300, and with the exception of 2 subadult Golden Eagles all the migrants were juvenile birds. I was greeted at the site this morning by 9 Bighorn rams, and before the wind increased the day was delightful. Vesper Sparrows were singing for the first time and male Townsend’s Solitaires were in splendid voice during prolonged aerial displays with two birds performing side-by-side on occasion. At least 4 Brown-headed Cowbirds flew high to the west over the ridge during the morning, but the most unusual bird was a male Belted Kingfisher that also flew high to the west at 0935: both species were new for the ridge top. Tomorrow will be the last day of the 2008 spring count. 12.5 hours (952.3) SSHA 2 (188), NOGO 3 (136), RTHA 2 (221), GOEA 5 (2976) TOTAL 12 (4176)
Friday, May 16, 2008
Thursday, May 15, 2008
May 15 [Day 80] The temperature rose to a season-high 17C from a low of 7C, with W-WNW winds gusting between 30 and 65 km/h all day: it was like spending the day inside a hair-drier! Apart from some altostratus low to the horizon before 0900 the day was completely cloudless and finding and keeping birds flying high in the blue in the binoculars with the strong gusty winds took a lot of effort. The day’s total of 21 migrant raptors is not a bad late-season count and again the flight was dominated by Sharp-shinned Hawks and Golden Eagles, all of which were immature as were the Cooper’s Hawk and 2 Northern Goshawks. The female American Kestrel that flew along the ridge at 1820 was only the second for the season and the first since the anomalously early male seen on March 19. Passerine migration was confined to 6 American Pipits and 5 Pine Siskins, and a very noisy pair of copulating
Wednesday, May 14, 2008
Tuesday, May 13, 2008
May 13 [Day 78] Another 1 cm of snow fell overnight but the rest of the day was precipitation-free. Winds were W-WNW gusting 30-70 km/h all day, the temperature rose to 4.5C from a low of 0C, and cloud cover was 100% cumulus and altostratus all day. The first migrant raptor was a juvenile Golden Eagle at 0831, but the second bird, a juvenile light morph calurus Red-tailed Hawk did not appear until 1105 and subsequent movement was only one or two birds an hour until the 3rd juvenile Golden Eagle went north at 1806. The 4 Sharp-shinned Hawks brought the season’s total to 158 passing the highest ever Mount Lorette count for the species of 155 in 1999. High winds ensured that passerines were scarce on the ridge, but the total of 61 Bighorn Sheep seen in 2 groups to the north was a high count for the year. 12.67 (902) OSPR 1 (20), SSHA 4 (158), COHA 1 (32), NOGO 1 (125), RTHA 1 (215), GOEA 3 (2954) TOTAL 11 (4092)
Monday, May 12, 2008
Sunday, May 11, 2008
May 11 [Day 76] I returned home from the Gala at 0030 and after what seemed to be 5 minutes sleep I was climbing the ridge at 0730. At 0740 heavy wet snow began which turned to rain at 0900 when I collected the equipment and went down to the Valley View site where I watched the rain fall until 1730 when I finally gave up. The peaks were obscured all day and although the ridge appeared after 1600 there was little prospect of movement. 10 hours (876.7) No migrant raptors
Friday, May 9, 2008
May 9 [Day 74] The day started with heavy wet snow falling with everything obscured, but it stopped at 0800 leaving 8.5cm fresh on the ground. I climbed to the ridge where the wind was NE-E gusting to 40 km/h and -4C which left a little to be desired in the comfort department, and light snow continued to 1310 after which there were periods of snow and flurries to 1810 with generally overcast skies. The clouds began to break by late afternoon, the wind dropped and by 1900 it was calm, sunny and the temperature had risen to 0C. Because of the conditions only three migrants were seen including a juvenile Golden Eagle at 1752 which I first saw soaring well to the south. It slowly glided northward towards me and soared high immediately to the south, then continued to glide to the north. Suddenly I was aware of the bird plummeting vertically to the ground in a hunting stoop just to the south of the site and by running to the edge of the hill I saw it perched on the ground empty-taloned where it was immediately mobbed by two resident ravens. The eagle raised its hackle feathers and looked splendidly fierce for a few seconds before flying to the west with the ravens in hot pursuit, where it soared again before gliding to the north. Meanwhile the Columbian Ground Squirrel that was the intended meal was giving its call note every couple of seconds for several minutes, either as an “all clear” signal or as a “where’s my clean underwear?” call. The most notable non-raptor sighting was 4 American Crows flying west at 1410, the first time in three field seasons that I have seen them above the ridge. 12.75 hours (853.2) BAEA 1 (444), GOEA 1 (2940), PRFA 1 (16) TOTAL 3 (4058)
Thursday, May 8, 2008
May 8 [Day 73] I again watched from the Valley View site and with moderate to strong W winds on the ridge all day this time it proved to be the right decision. Cloud cover was 70-100% cumulus, stratus and, late in the day, cirrus and after some early morning cloud drape the mountains were clear all day except for the day’s only serous snow/hail event from 1810 to 1850 when everything was obscured. The temperature at the base of the ridge reached 7C from a low of 1.5C. The favourable winds and clear ridges allowed a reasonable movement of 17 raptors between 0951 and 1905, the highlight of which was an adult light morph Broad-winged Hawk at 1116 which was the 5th of the season and equals the highest count for a RMERF spring count. The 10 Golden Eagles comprised 3 subadults and 7 juveniles, but it is doubtful if the birds would have reached
Wednesday, May 7, 2008
May 7 [Day 72] After having been soaked the day before and with thunderstorms forecasted today I decide to watch from the Valley View site. In the event I could have been on the ridge as showers were brief and confined to the afternoon and the thunder comprised only a few rumbles. Both the ground and ridge winds were light all day and cloud cover was 100% cumulus/stratus apart from mid afternoon when it cleared to 80-90%. Raptor movement was very sparse and all but one of the 8 birds seen occurred between 1141 and 1212, with an additional Sharp-shinned Hawk flying north at 1509. The unsettled weather is supposed to stay until Friday, but we shall see! 11 hours (827.7) SSHA 3 (150), COHA 3 (29), NOGO 1 (124), GOEA 1 (2929) TOTAL 8 (4038)
Tuesday, May 6, 2008
May 6 [Day 71] Conditions were calm until
Monday, May 5, 2008
May 5 [Day 70] Winds were again westerly all day, light in the morning and gradually increasing to 40 km/h in the late afternoon. Cloud cover was 100% altostratus and cumulus all day giving rather gloomy conditions and the temperature started at 5C and rose to 11C. The calm conditions precluded early movement and the first bird, a juvenile Northern Goshawk, wasn’t seen until 1133. After that, however, movement was steady until 1500 when it slowed to a trickle until 1844 when the last 4 Golden Eagles of the day came through in a 12 minute period. The last bird of the day was a juvenile Bald Eagle at 1929. Eleven of the day’s 36 migrants moved between 1200 and 1300 which included the 4,000th migrant of the season which was a Golden Eagle at 1218, and an11 minute period that saw the passage of 3 Turkey Vultures, an adult dark morph “Harlan’s” Red-tailed Hawk, a juvenile Golden Eagle and an adult Peregrine Falcon. The Golden Eagle count comprised 2 subadults and 11 juveniles, and the resident pair was seen soaring together on occasion, but never near a visible nest site. On a couple of occasions the male vigorously mobbed a resident Red-tailed Hawk only to have the tables quickly reversed with the eagle beating a hasty retreat closely pursued by the hawk! The recent list of bird species apparently out of place on a mountain ridge was augmented at 1334 by our first Great Blue Heron flying high to the north just east of the ridge. The first Yellow-rumped Warbler of the year was singing at 0745, but the most spectacular bird of the day was undoubtedly a male Dusky Grouse in full display strutting with a fully fanned tail and expanded scarlet nuchal sacs set off in their coronas of snow white exposed under-feathers. 12.83 hours (807.7) TUVU 3 (6), OSPR 1 (18), BAEA 3 (442), NOHA 1 (25), SSHA 7 (147), COHA 1 (26), NOGO 3 (123), UA 1 (8), RTHA 2 (213), GOEA 13 (2928), PEFA 1 (5) TOTAL 36 (4030)
Sunday, May 4, 2008
May 4 [Day 69] (Bill) Winds were westerly all day gusting to 30 km/h by mid-afternoon, and cloud cover ranged from 2%-100% altostratus and altocumulus cloud cover giving sunny skies, or hazy sunshine after 1300. The temperature rose to a very pleasant 14C from a low of 4C. Raptor migration was slow but steady for much of the day with 9 of the day’s 28 birds occurring between 1600 and1700. The highlight of the day was the 11th Ferruginous Hawk of the season, a light morph adult. Only 3 Golden Eagles were recorded: 2 subadults and 1 juvenile. The other highlights were both species not expected to be seen on a mountain ridge at 1900 m and both were new species for the site. At 1115 2 American White Pelicans glided high from the south, soared high in front of
May 3 [Day 68] (Bill) West winds gusting to 20 km/h gave way to variable light winds after 1000, thin altostratus and cirrus cloud yielded to thickening cumulus cloud after 1130 and the temperature ranged from 2C to 10.5C. Probably because of the light winds raptor movement was very sporadic between 1133 and 1827 with only 13 birds counted including 5 Golden Eagles (2 subadults, 1 juvenile and 2 of indeterminate age). A calling Mourning Dove early in the morning just above the parking area was a new species for the study area, and 3 Brewer’s Blackbirds flying above the ridge to the WSW at 0903 were a first for the site. Probable migrants included 21 Townsend’s Solitaires, 18 American Robins, 10 Bohemian Waxwings , 23 Grey-crowned Rosy-Finches, and 4 American Pipits which were the first of the season. 14 hours (781.2) BAEA 1 (435), SSHA 3 (138), COHA 1 (24), NOGO 2 (118), RTHA 1 (203), GOEA 5 (2912) TOTAL 13 (3966)
Friday, May 2, 2008
May 2 [Day 67] It was a rare calm day on the ridge with no significant wind until after 1400 when it briefly gusted from various quarters to 15 km/h. The temperature rose to 10.5C from a low of 0C, and 20-60% cumulus cloud cover for most of the day made locating birds relatively easy although unlike yesterday few were close to the ridge. Movement was very sporadic with most birds moving during periods of SW winds, with a period between 1225 and 1510 with no movement at all. Notable were the 4th Broad-winged Hawk (adult light morph) and 13th “Harlan’s” Red-tailed Hawk (adult dark) of the season and all 11 migratory Golden Eagles were immature, 1 subadult and 10 juveniles, the last of which came through at 1911. When I arrived at the ridge top the site was occupied by 6 Dusky Grouse and males were heard hooting throughout the day. New species for the season were Savannah Sparrow and a singing Ruby-crowned Kinglet, and Tree Swallow and a winnowing Wilson’s Snipe were recorded for the first time from the ridge. At 1008 a Blue Jay and a Steller’s Jay flew together to the west. 13 hours (767.2) NOHA 2 (24), SSHA 5 (135), COHA 1 (23), NOGO 2 (116), BWHA 1 (4), RTHA 1 (202), UB 1 (4), GOEA 11 (2907) TOTAL 24 (3953)
Thursday, May 1, 2008
May 1 [Day 66] Again the weather forecast was completely wrong and instead of rain it was a day of sunshine with the temperature rising to 5C from a low of -3C and a mainly WNW wind gusting to 30 km/h to ensure that the day was not too enjoyable. Cloud cover was cumulus, cirrus and cirrostratus gradually increasing from 5% early in the morning to 80% at the end of the day providing an excellent observing backdrop. Again there was no early movement and the first bird, an adult Northern Harrier, didn’t appear until 1056 and steady migration only started after noon after which it was steady until the last 2 Golden Eagles glided north at 1935. Many of the birds moved low overhead giving ample opportunity to study details of plumage. Immature Golden and Bald Eagles have dominated the flight for the last couple of weeks, but now young birds of other species are becoming more common with all 4 Red-tailed Hawks, 4 Northern Goshawks and 4 of the 17 Sharp-shinned Hawks being juveniles. All the 26 migrant Golden Eagles were immature: 6 subadults and 20 juveniles. The 3rd Broad-winged Hawk of the season, a light morph adult, flew low overhead at 1739. For the first time this season I observed a resident Golden Eagle carrying prey (probably ground squirrels) towards the west on two occasions, probably a male going to present food to the female: maybe breeding is getting closer! On the ridge Townsend’s Solitaires were anything but solitary as I counted 19 there, many of which were singing. For the first time there was a variety of finches moving: 46 Grey-crowned Rosy-Finches, 1 Pine Grosbeak, 2 Red Crossbills, 3 White-winged Crossbills and a single Pine Siskin. 13 hours (754.2) OSPR 2 (16), BAEA 2 (434), NOHA 2 (22), SSHA 17 (130), COHA 4 (22), NOGO 4 (114), BWHA 1 (3), RTHA 4 (201), GOEA 26 (2896), MERL 1 (17), PRFA 1 (13) TOTAL 64 (3929)
Wednesday, April 30, 2008
April 30 [Day 65] So much for the weather forecast! I spent the day on the ridge after all, where it was sunny all day with 10-40% cumulus cloud cover. The wind initially was from the NW gusting 70 km/h and with a starting temperature of -4C it felt a little chilly. The wind progressively backed to WNW and finally W and moderated to gusts of 25-40 km/h as the pressure rose rapidly after 1500, and the temperature reached a high of 3C. As yesterday early movement was slow with the first bird, a juvenile Golden Eagle appearing at 0942 and by 1300 only 6 migrants had passed. Subsequent movement was steady peaking at 14 birds between 1500 and 1600 and the last bird, the first Swainson’s Hawk of the season (an adult light morph), moved north at 1855. This is the first time the species has been recorded in April on an RMERF count. Other notable birds were the second Broad-winged Hawk of the season (a light juvenile) and the 5th Gyrfalcon (an adult grey morph, probable female) which flew low overhead giving a splendid view in the bright sunlight. Two of the Red-tailed Hawks were dark morph “Harlan’s Hawks” (one a juvenile), and the 21 migrant Golden Eagles comprised 5 subadults and 16 juveniles but there was no sign of the resident birds today. Grey-crowned Rosy-Finches continue to move in good numbers with 289 flying north along the ridge with the largest flock containing about 150 birds. 12.75 hours (741.2) SSHA 15 (113), NOGO 1 (110), UA 1 (5), BWHA 1 (2), SWHA 1 (1), RTHA 4 (197), UB 1 (3), GOEA 21 (2870), MERL 2 (16), GYRF 1 (5), PRFA 1 (12) TOTAL 49 (3865)
April summary (compared to 1993-2008 Mount Lorette count averages). We lost 4 complete days to inclement weather during the month and a further 4 days had the count curtailed by the weather.We spent 26 days in the field (-8.7%) but the 324.6 hours spent was almost exactly average for the month (+0.8%). The combined species total of 1212 was the 3rd highest total ever (+44.2%) and included 17 species: the only species not recorded was American Kestrel, only the second time it has been absent from an April count. The Golden Eagle count of 646 was 5.8% above average making it the 6th highest April count and the 121 Bald Eagles were 33.6% above average and the 3rd highest April count. New monthly high counts were made for Osprey (14, +156.1%), Northern Harrier (19, +188%), Sharp-shinned Hawk (112, +210.5%), Northern Goshawk (49, +221%), Red-tailed Hawk (172, +519%), Ferruginous Hawk (9, +3275.0% (!) and Prairie Falcon (8, +328.6%). Turkey Vulture (3, +800%), Broad-winged Hawk (2, +275%) and Gyrfalcon (3, +400%) equaled the previous highs, and Merlin (13, +91.2%) and Peregrine Falcon (4, +172.7%) were both second highest counts. Cooper’s Hawk (17) was 66.7% above average and Swainson’s Hawk was recorded for the first time on an April count. The only species occurring in less than average numbers were Rough-legged Hawk (5, -69.8%) and American Kestrel (0, -100%).
Tuesday, April 29, 2008
April 29 [Day 64] I started the day on the ridge but when light rain turned to wet snow at 1005 I retreated to the Valley View site where I spent the rest of the day. Rain persisted until 1350, after which the rest of the day was dry, with the temperature at the base of the ridge reaching 9C. Ridge winds were moderate westerly all day, and mid afternoon was sunny with 60-70% mainly cumulus cloud before the clouds thickened again after 1700. A single Sharp-shinned Hawk that moved along the ridge at 0816 was the only migrant before the rain started, and movement only really began at 1410 after which there was a fairly steady stream of birds until the last Bald Eagle went north at 1924. Compared to the last few days there was little specific variety and the flight was dominated by Golden Eagles, the total of 29 comprising 1 adult, 5 subadults and 23 juveniles. Again compared to recent days the resident Golden Eagles were hardly in evidence today. The forecast for the next two days is for overcast conditions with rain or snow so I shall probably watch from the Valley View site (if at all!) until Friday. 12.67 hours (728.5) BAEA 2 (432), NOHA 1 (20), SSHA 6 (98), NOGO 1 (109), RTHA 4 (193), GOEA 29 (2849) TOTAL 43 (3816)
Monday, April 28, 2008
April 28 [Day 63] We finally made it to the ridge top to observe for the first time this season with the site snow-free but with several metres of snow packed on the lee side of the ridge. Even at 1900 m the temperature rose to 13.5C from a low of 6C, and it was mainly sunny with 30-60% cumulus cloud cover for most of the day. The wind was westerly all day gusting to around 40 km/h until 1715 after which gusts were in the vicinity of 70 km/h, and after 1615 smoke haze developed which lingered until the end of the day. Despite the wind it was good to be back up high and to appreciate again close views of migrating raptors, and there were fairly good numbers to see with 67 birds of 11 species (and 2 additional subspecies) moving: the 3rd highest count this month. The movement started late with only 4 birds seen by 1100 and the first Golden Eagle migrant didn’t appear until 1331 but then movement was steady until the passage of the last bird at 1854. The 5 Northern Harriers (all adults: 2 males and 3 females) was the highest count this season, and one of the day’s 8 Red-tailed Hawks was an adult “Krider’s Red-tailed Hawk” which glided close along the ridge at 1654 for a first site record. A juvenile light morph Ferruginous Hawk at 1405 was the 10th record of the species this season, and all the 22 Golden Eagles were immature: 4 subadults and 18 juveniles. The closest birds of the day, however, were the three resident Golden Eagles that glided by moving low to the north over the ridge at 1848, and despite much display by the male (or males) during the day, the female still shows little sign of nesting. Passerine movement along the ridge comprised 1 Mountain Bluebird, 2 American Robins and 83 Grey-crowned Rosy-Finches. 12.75 hours (715.8) OSPR 3 (14), BAEA 2 (430), NOHA 5 (19), SSHA 17 (92), COHA 2 (18), NOGO 1 (108), RTHA 8 (189), FEHA 1 (10), GOEA 22 (2820), MERL 3 (14), PRFA 1 (11), UU 2 (3) TOTAL 67 (3773)
Sunday, April 27, 2008
Saturday, April 26, 2008
April 26 [Day 61] After the worst week’s weather we have ever encountered in April today was sublime with the temperature reaching 11.5C from a low of -6C under perfectly cloudless skies, with moderate WNW to W winds at ridge level. Raptor movement was book-ended by Sharp-shinned Hawks at 0928 and 2002 and between was a steady stream of birds of a season high 13 species. The combined species count of 146 birds was the highest since March 21 and the hourly counts at 1300-1400, 1400-1500 and 1500-1600 were progressively the highest yet for April at 23, 25 and 26 respectively. The counts for Osprey (4), Sharp-shinned Hawk (27), Cooper’s Hawk (5) and Red-tailed Hawk (24, including 2 “Harlan’s Hawks”) were the highest so far this season, and notable were the 2nd Turkey Vulture (adult), 3rd Peregrine falcon (adult) and 4th Gyrfalcon (juvenile grey morph) of the season. The total of 73 Golden Eagles was the highest daily count since March 21 and comprised 6 adults, 11 subadults and 56 juvenile birds. Without the help of Nel, Keith and Raymond finding birds moving high in the blue-out the day’s count would have been somewhat less. The resident Golden Eagle pair was often seen soaring together with the male displaying, but there is still no sign of nesting behaviour: it’s getting late! 13.25 hours (690.7) TUVU 1 (2), OSPR 4 (9), BAEA 5 (422), NOHA 1 (13), SSHA 27 (68), COHA 5 (14), NOGO 2 (106), RTHA 24 (177), RLHA 1 (16), GOEA 73 (27776), GYRF 1 (4), PEFA 1 (3), PRFA 1 (10) TOTAL 146 (3657)
Friday, April 25, 2008
Thursday, April 24, 2008
Wednesday, April 23, 2008
April 23 No observation. All ridges were clear until 0740 when the snow began and by 0800 everything was obscured and stayed that way for the rest of the day.
Tuesday, April 22, 2008
April 22 [Day 58] The forecast called for yet more snow but the day was precipitation-free with the temperature rising to 4.5C from a low of -5C with moderate to strong westerly winds for most of the day. The cloud cover ranged from 95% early and late in the day down to 50% at 1600 giving some welcome sunshine, and the ridges were clear until 1800 after which cloud progressively enveloped the mountains. Raptor movement started at 1056 and peaked at 10 birds between 1600 and 1700 with the last Red-tailed Hawk seen at 1835. All 11 migrant Golden Eagles were juveniles, and the resident pair was again loosely associated with a third adult: at one time both (presumed) males displayed simultaneously. The Northern Goshawk at 1657 was the 100th migrant of the season, and 1 of the 6 migrant Red-tailed Hawks was a Harlan’s. One unidentified swallow flew to the north at 1748, probably regretting that it had migrated at all. 10.25 hours (655) BAEA 4 (410), NOHA 1 (12), SSHA 5 (31), NOGO 5 (102), UA 1 (3), RTHA 6 (150), GOEA 11 (2671) TOTAL 33 (3445)
Saturday, April 19, 2008
Friday, April 18, 2008
Thursday, April 17, 2008
April 17 [Day 56] A conspicuous Chinook Arch to the east gave way after 1100 to mainly cumulus cloud cover ranging from 20 to 70% giving mainly good observing conditions. Ridge winds were strong NW to W only moderating after 1900, and the temperature ranged from 3C to a high of 10C for much of the afternoon. The first migrant raptor of the day was a subadult Golden Eagle at 0920 but movement was generally slow until the afternoon with birds after 1700 moving very high above the
Wednesday, April 16, 2008
Tuesday, April 15, 2008
April 15 [Day 54] The day started with a light snow flurry, then the clouds cleared to 30% cumulus with sunshine. As yesterday, it didn’t last with snow flurries and showers persisting to 1710 when heavy snow developed depositing 2 cm by 1805, after which it cleared again. The temperature started at 0C, rose to 6.5C at 1500 and was -1C at 1900, and the upper winds were moderate WNW all day, although the ground winds varied considerably as squalls developed. A rapid rise in barometric pressure at the end of the day gives hope of better things tomorrow. There was raptor movement involving 7 species in the clear periods, with the first bird at 0828 an unidentified large falcon presenting a perfect silhouette against the eastern light and the last migrant, an adult Bald Eagle, moving between flurries at 1534. No birds moved after 1805 when things finally cleared up. The only passerine migrants were 204 Grey-crowned Rosy-Finches in 5 flocks, and a female Purple Finch at the site was the first for the year. 12.25 hours (606.7) BAEA 1 (399), NOHA 1 (9), NOGO 3 (91), RTHA 4 (130), RLHA 1 (15), GOEA 3 (2617), UF 1 (1) TOTAL 14 (3312)
Monday, April 14, 2008
April 14 [Day 53] A brief shower ending at 0740 was the first rain of the season and gave way to a beautiful sunny spring morning that lasted until 0840 when rain started that, with a few sleet interludes, lasted until 1630. The temperature reached 9C from a low of 6C and ridge winds were moderate westerly all day. With the exception of early morning and late afternoon cloud cover was 100% stratus and the higher mountains of the
Sunday, April 13, 2008
April 13 [Day 52] At 0700 the temperature was 9.5C and rose to a high 19C at 1600 and was still 15C at 2000. Ridge winds were W moderate to strong all day, and for the first time ground gusts of 40 km/h did not cause wind-chill discomfort. An altostratus Chinook Arch hung over the
Mount Lorette (Bill) Similar weather conditions prevailed at Lorette with the temperature reaching 16.5C from a low of 5C, ground winds were WSW gusting 40 km/h with medium to strong westerlies aloft and 80% altostratus cloud in the morning diminished to give cloudless skies from 1100 to 1400 after which a mixture of cumulus and cirrus developed. Unfortunately, there was no similarity in raptor movement with the only migrants being a juvenile Bald Eagle at 1245 and a subadult Golden Eagle at 1548. 14 hours (478.9) BAEA 1 (83) GOEA 1 (1176) TOTAL 2 (1285)
Saturday, April 12, 2008
April 12 [Day 51] It was the warmest day so far this season with the temperature rising to 16C from a low of -1C, with cloudless skies until 1730 when up to 20% cirrus cloud developed. Winds were W all day, light in the morning and moderate after
Mount Lorette (Joel) There were similar weather conditions with the temperature ranging from -4C to 15C, generally 10-20% cirrostratus cloud cover and ridge winds moderate NW to WNW. The raptor count comprised 4 Bald Eagles (3 adults and 1 subadult) and 4 Golden Eagles (2 subadults and 2 juveniles) 13 hours (464.9) BAEA 4 (82), GOEA 4 (1175) TOTAL 8 (1283)
Friday, April 11, 2008
April 11 [Day 50] (Raymond and Denise) The temperature ranged from 0C to 9C, and most of the day was sunny with a 10-50% altostratus, cumulus and cirrus cloud cover, with ridge winds moderate W to SW. Movement was slow and sporadic between the first Golden Eagle at 1012 and the last at 1816, and the migratory Golden Eagle total of 8 was the lowest for a non weather affected day since March 1. Only 4 species of migrant were seen including 2 female or juvenile Northern Harriers. The resident Pair of Golden Eagles were seen copulating high on the
Thursday, April 10, 2008
April 10 [Day 49] The temperature rose to 6C from a low of -2C, but high humidity and ground winds gusting to 40 km/h made it feel much cooler. Ridge winds were W-WNW moderate to strong all day, and cloud cover generally ranged from 30-70% cumulus, altostratus and cirrus except for brief snow flurries after 1645 when the eastern peaks were periodically obscured for up to 20 minutes. Raptor movement started at 0953 with a Golden Eagle and was slow but steady up to the last bird, the second Cooper’s Hawk of the season, moving north in a flurry at 1944. There were only six migrant species today including only the 3rd Northern Harrier (an adult female) so far, and 2 of the 9 Red-tailed Hawks were adult dark-morph Harlan’s. Of the 24 Golden Eagles 5 were adults, 10 subadults and 9 juveniles. Keith managed to get up on the ridge for about 3 hours and added 3 of the Golden Eagles that were hidden from us at the time by a snow squall. The resident pair was again seen widely, occasionally in the company of a third non-migrant adult bird, but no nest visit was observed. A male “Pink-sided” Junco (J.h.mearnsi) was the first seen this year and the fourth Dark-eyed Junco subspecies recorded in the last three days. 13.25 hours (543.1) BAEA 2 (374), NOHA 1 (3), COHA 1 (2), NOGO 2 (82), RTHA 9 (108), GOEA 24 (2573) TOTAL 39 (3196)
Mount Lorette No observation owing to a lack of observers.
Wednesday, April 9, 2008
April 9 [Day 48] It was again a pleasant day with good viewing conditions with the temperature ranging from -5C to 7.5C, moderate W winds aloft all day and 100% thin altostratus cloud giving way after 1200 to a mix of 60-100% cumulus and cirrus. Raptor movement started at 0836 when the first two of the day’s 27 Golden Eagles went north, peaked at 12 birds between 1400 and 1500 and dwindled after 1600 with the last of the day’s 10 Bald Eagles seen at 1940. The flight comprised 8 species and included the first ever Turkey Vulture seen at the site at 1110, the earliest ever seen on an RMERF count by 4 days, the first Peregrine Falcon of the season at 1320 and 2 dark morph adult Ferruginous Hawks at 1203 and 1312 which provided stunning views as they soared against white cumulus clouds in strong sunshine. The 15 Red-tailed Hawks included the season’s first juvenile calurus and an adult dark morph Harlan’s Hawk, and the 27 Golden Eagles included only 4 adult birds, with 14 subadults and 9 juveniles comprising the rest of the total. At 1307 a resident Prairie Falcon sliced into a dense flock of about 60 Grey-crowned Rosy-Finches and probably reduced them to a flock of around 59 birds! The resident Golden Eagles were again prominent throughout their range all day but didn’t appear to visit any nest site. Passerine movement included 12 American Crows, 9 American Robins and 325 (or 324!) Grey-crowned Rosy-Finches. 13.17 hours (529.8) TUVU 1 (1), BAEA 10 (372), NOGO 1 (80), RTHA 15 (99), FEHA 2 (6), RLHA 1 (14), GOEA 27 (2549), UE 1 (9), PEFA 1 (1) TOTAL 59 (3157)
Tuesday, April 8, 2008
April 8 [Day 47] A pleasant day with ground winds mainly SW not exceeding 15 km/h and ridge winds NW-W moderate all day. The temperature reached 6C from a low of -3C and until 1030 it was almost cloudless and then ranged from 5-40% cumulus until 2000 when a 70% cirrus cloud cover developed. I saw the first Golden Eagle at 0724 but the second did not appear until 0920 but subsequent movement was steady with maximum passage of 14 birds from 1800 to 1900, and the last bird of the day, a Red-tailed Hawk, went north at 1929. The total of 7 Red-tailed Hawks brings the season’s total to 84, two more than the previous spring high RMERF count at
Monday, April 7, 2008
April 7 [Day 46] Winds at ridge level were W moderate becoming moderate to strong after 1300, the temperature rose to 7C from a low of -0.5C and for most of the day cloud cover was 20-60% cumulus and cirrus giving mainly sunny conditions. At 1750 the winds shifted to NE bringing snow to 1835, with most of the ridges obscured, but it subsequently cleared allowing further raptor movement. The first Golden Eagle went north at 0839 and movement was fairly steady all day with the last Golden Eagle moving at 1951, the latest migrant so far this season. The 35 Golden Eagles comprised 17 adults, 5 subadults and 13 juveniles, and the 2 Rough-legged Hawks were the first since March 21. The resident Golden Eagle pair were seen displaying throughout their home range but were never seen to approach any of the nest sites. 12.92 hours (503.6) BAEA 5 (352), NOGO 4 (76), RTHA 7 (77), RLHA 2 (13), GOEA 35 (2480) PRFA 1 (8) TOTAL 54 (3034)
Mount Lorette No observation owing to a lack of observers.
Sunday, April 6, 2008
April 6 [Day 45] The forecasted 70 km/h winds did not materialise and winds on the ridges were moderate WNW for most of the day. The temperature ranged from -1C to 6C and much of the day saw 100% overcast skies with altostratus and cumulus cloud. Raptor movement was slow but steady between 0858 and 1421 but subsequently only 2 more birds moved north with the last, a Red-tailed Hawk, at 1750. For the first time this season immature Golden Eagles (7 subadults and 2 juveniles) outnumbered adult (4) birds suggesting that the adult movement is now substantially complete. If this is the case it appears that we are once again heading for a low Golden Eagle count. A singing Cassin’s Finch at 1015 was the first for the season, and apart from 120 Grey-crowned Rosy-Finches there was little passerine movement. 12 hours (490.7) BAEA 6 (347), NOGO 3 (72), RTHA 2 (70), GOEA 13 (2445) TOTAL 24 (2980)
Mount Lorette (Bill) The weather was similar with a temperature range of -2C to 6C, light to moderate W-SW winds and 100% altostratus and cumulus cloud cover for much of the day. The first bird was seen at 0723, maximum passage was early with 8 birds passing between 0800 and 0900, and the last bird went north at 2008, the latest seen at either site this season. The Golden Eagle count (21 adults, 4 subadults and 3 juveniles) was the first real movement at the site since March 1st, and an adult Peregrine Falcon was the third record of the species this season. 14hours (416.7) BAEA 2 (76), GOEA 29 (1167), PEFA 1 (3) TOTAL 32 (1265)
Saturday, April 5, 2008
April 5 [Day 44] Another pleasant day with a temperature high of 7C from a low of -3C, steady moderate NW to WNW winds all day, and 30-70% cumulus cloud allowing plenty of sunshine that has finally melted last weekend’s snowfall. The first raptor migrant was a Golden Eagle at 0914, and subsequent movement was slow but steady with no hour exceeding 9 birds and the last Golden Eagle was recorded at 1829. The 32 Golden Eagles comprised 19 adults, 7 subadults and 6 juvenile birds, and all the migrant Red-tailed Hawks were light morph adult calurus. In addition to the resident Golden Eagle pair, the female of which only visited the nest site for about 10 seconds today, there are also resident pairs of Northern Goshawk, Red-tailed Hawk (1 light and 1 rufous) and Prairie Falcon in the area. About 205 Grey-crowned Rosy-finches flew to the north, and a single flock of 30 swans flew high to the east over the
Mount Lorette (Ron) Morning snow in the
Friday, April 4, 2008
April 4 [Day 43] At last, a spring-like day, with the temperature reaching 9C from a low of 0C, light to moderate WNW winds on the ridge and 100% thin altostratus cloud cover all day allowing hazy sunshine. Raptor movement was slow, starting at 1032 and peaking at 11 birds between 1200 and 1300 and tailing off thereafter with the last bird, the second Northern Harrier of the season, seen at 1838. The Golden Eagle count of 16 was the lowest for a non weather affected day since March 3. One of the 7 Red-tailed Hawks was an adult dark morph Harlan’s. The resident pair of Golden Eagles was in evidence all day with much vigorous displaying observed, but neither was seen to visit either of the nests. The day produced a season-high total of 31 bird species including 6 species of corvid: Grey, Steller’s and Blue Jays, Clark’s Nutcracker, Black-billed Magpie and Common Raven, and I saw the 7th Alberta corvid species, American Crow, just after leaving the site. 12 hours (466.2) BAEA 8 (337), NOHA 1 (2), SSHA 1 (4), NOGO 1 (67), RTHA 7 (58), GOEA 16 (2400), MERL 1 (6) TOTAL 35 (2907)
Thursday, April 3, 2008
April 3 [Day 42] Winds were again moderate to strong WNW on the ridges all day and SW to variable in the valley. At least it was a bit warmer today with a high of 8C and a low of -2C, and there was plenty of cloud with 70-100% mainly altostratus and cumulus cover but generally thin enough to allow hazy sunshine. Raptor migration made up for relatively low numbers with the highest specific variety so far, with 8 species migrating between 0745 and 1930. Only one hour, 1500-1600 reached double figures with 12 birds moving. An adult light morph Ferruginous Hawk at 1423 was the third for the season and sets a new high for RMERF spring counts, the 2 Merlins comprised adult males of both the races columbarius and richardsonii, and the 31 Golden Eagles comprised 20 adults, 7 subadults and 4 juveniles. The resident female Golden Eagle landed on the Bluff Mountain nest at 1021, followed 3 minutes later by the male, and the both remained there until 1049, the female moving material within the nest while the male perched on the rim occasionally preening. They were also seen together on the nest at 1809 but left shortly afterwards. With the exception of 5 American Robins at 1936 there was no northward non-raptor migration, but a total of 22 Canada Geese, 4 unidentified gulls and, at 1243, a flock of 9 Common Loons migrated high across the
Wednesday, April 2, 2008
April 2 [Day 41] The weather remains cool with the temperature rising to 3C from a low of -12C, but to compensate it was sunny all day with 5-10% cumulus to 1300 and cloudless thereafter. Winds were initially light but became strong W-SW after 1400 only abating after 1900. Raptors were very hard to detect in the blue-out conditions but fortunately I had the help of half a dozen observers without whom the count would certainly have been lower. The first Golden Eagle did not appear until 1015 and movement was slow but steady until the last Golden Eagle went north at 1918. The 15 Red-tailed Hawks were all adult calurus with 11 light and 4 dark morphs, and the total was the highest so far this season. The Ferruginous Hawk, an adult light morph, was only the second of the season, and 16 of the 38 Golden Eagles were immature birds (8 subadults and 8 juveniles), the highest percentage so far. The resident pair was conspicuous all day with the male and occasionally both birds displaying at various sites, and copulation was observed at 1148 on a snag atop the ridge of Bluff Mountain. The female has obviously not yet decided where she wants to lay her eggs! The 25 bird species seen today was the highest so far this season with the highlight being the first Tree Swallow of the year at 1405. 12.5 hours (441.7) BAEA 6 (321), SSHA 1 (2), RTHA 15 (42), FEHA 1 (2), UB 1 (1), GOEA 38 (2353) TOTAL 62 (2816)
Mount Lorette (Joel and Des) The weather was almost identical to that at Piitaistakis including a high of 3C, blue skies all day and strong W winds combing the snow of the ridges in the afternoon. The day produced only 3 migrants: 1 Bald and 2 Golden Eagles. 12.25 hours BAEA 1 (74), GOEA 2 (1126) TOTAL 3 (1217)
Tuesday, April 1, 2008
April 1 [Day 40] The starting temperature was -10C and it briefly rose to 2C at
Monday, March 31, 2008
March 31 [Day 39] It was -16C under a cloudless sky at 0800, but cloud quickly developed after 0900 progressively thickening to 100% stratocumulus after 1700. Winds were light to moderate all day the ridge winds backing from NW initially to W by mid afternoon. The temperature climbed to 1C and occasional brief snow flurries in the afternoon gave way to heavy snow after 1850. The calm cool conditions meant that the first 4 Golden Eagles were not seen until 1136, and movement remained relatively slow until 1500-1600 when 61 birds (16 Bald Eagles, 2 Northern Goshawks and 43 Golden Eagles) moved, the highest hourly count so far this season. The pace subsequently dwindled with the last bird going through at 1829 just ahead of the snow. The 24 Bald Eagles and 8 Red-tailed Hawks are both season-high daily counts, and the total of 105 Golden Eagles included 3 subadult and 7 juvenile birds. Passerine migrants included 6 American Crows, 51 Grey-crowned Rosy-Finches and 54 Common Redpolls, and a Barred Owl sang briefly at 1310 for the first time this season. 11.5 hours (416.7) BAEA 24 (311), NOGO 3 (61), RTHA 8 (25), GOEA 105 (2224) TOTAL 140 (2653)
March summary (compared to 1993-2008 Mount Lorette count averages). We spent 29 days (319.5 hours) in the field (+0.23% and +3.74% respectively) losing two full days to inclement weather. The combined species total of 2560 was 4.9% below average. The 262 Bald Eagles were the highest count ever (+127.3%), as was the 58 Northern Goshawks (+394%), 25 Red-tailed Hawks (+436%) and 7 Rough-legged Hawks (+218%). Ferruginous Hawk and American Kestrel were recorded for the first time in March. The Golden Eagle count of 2189 birds was 14.14% below average despite the fact that we had 12 days with counts above 100 birds (but none above 200 for the first time ever in March).
March summary This was the 16th consecutive complete March count at the site and the 4th consecutive year of full 31-day counts. The number of days and hours (343.1) are 7.2 and 11.4 above average respectively. Despite this the combined-species total of 1180 is 56.19% below average and 713 below the previous lowest count in 2007. Both Bald Eagle (70, previous low 79 in 1998) and Golden Eagle (1094, previous low 1782 in 2007) were also lowest-ever counts, 39.3% and 57.1% below average respectively. Most other species counts were low including 3 Northern Goshawks (-74.4%), 1 Red-tailed Hawk (-78.6%), 2 Rough-legged Hawks (-9.09%) and 2 Merlins (-14.3%).
Sunday, March 30, 2008
March 30 [Day 38] It was an encouraging start to the day despite calm conditions and -15C as all the ridges were clear and there was only 70% high cloud cover. It didn’t last and at 0945 snow began again and the ridges quickly disappeared. There was some partial clearing of the ridges between 1300 and 1510 with the temperature rising to -1.5C, but everything closed in again with moderate snow falling at 1510 when I left, with 3 cm of snow additional to the 13 cm fresh on the ground in the morning. The partial clearing in the early afternoon allowed one migrant Golden Eagle to move north along
Mount Lorette (Bill) The temperature ranged from -10C to -3C with mainly light winds all day. It snowed to 1100 and again after 1705, but in between raptors moved from 1126 to 1702, most of the birds being detected north of the site gliding to the NW. 12.17 hours (332.8) BAEA 3 (70), GOEA 15 (1086) TOTAL 18 (1171)
Saturday, March 29, 2008
March 29 No observation. Heavy wet snow until late afternoon with the ridges obscured all day.
Friday, March 28, 2008
March 28 [Day 36] (Raymond and Dawn) It was a remarkably calm day with winds generally 0-5 km/h in the valley and light at ridge level. The temperature ranged from -8C to a high of just 1.5C, despite sunny skies with variable cumulus cloud cover until after 1600 after which thickening altostratus cloud developed. The first Golden Eagle didn’t move until 1052, and subsequent migration was slow, peaking between 1400 and 1500 with the passage of 9 birds. The last migrant Golden Eagle was at 1641 after which movement stopped completely probably foreshadowing the snow that is forecasted for the next two days. Six of the 24 Golden Eagles and 3 of the 7 Bald Eagles were immature. 12.33 hours (397.7) BAEA 7 (287), NOGO 1 (58), GOEA 24 (2118) TOTAL 32 (2512)
Thursday, March 27, 2008
March 27 [Day 36] Winds aloft were moderate to strong NW to W all day, and in the valley they gusted to 40 km/h in the afternoon making observation uncomfortable as the temperature briefly rose to a high of 4C from a low of -4C. Cloud cover was 70-100% cumulus and altostratus all day. Raptor movement started earlier than on the last few days with the first Golden Eagle appearing at 0816 and when 17 Golden Eagles moved between 1000 and 1100 I had visions of a big day. Subsequent movement, however, remained steady with a highest hourly count of 18 between 1600 and 1700, and the final combined species total of 101 was the first three-figure count since March 22. Non raptor migrants comprised 6 Canada Geese, 30 Bohemian waxwings and 95 Grey-crowned Rosy-Finches. 12.17 hours (385.3) BAEA 3 (280), NOGO 3 (57), RTHA 3 (17), GOEA 90 (2094), MERL 1 (3), PRFA (4) TOTAL 101 (2480)
Mount Lorette (Brian) Conditions appeared ideal for migration with light to moderate W winds, 40-100% altostratus, cumulus and cirrostratus cloud and a temperature range of -4C to 2C, and the first Golden Eagle moved north at 0721, just one minute after the start of observation. When the last Golden Eagle went north at 1830, however it was only the 13th of the day, 6 of which moved together at 1430! 12.42 hours (299.3) GOEA 13 (1067), UE 1 (3) TOTAL 14 (1145)
Wednesday, March 26, 2008
March 26 [Day 35] It was the most pleasant day in a while and actually felt spring like on occasion. The temperature briefly rose to 5C from a low of -10C, and W-SW winds were generally light to moderate both in the valley and aloft. The sky to 1030 and after 1700 had 100% altostratus cloud cover, but between we had 10-60% cumulus giving plenty of sunshine. The relatively calm conditions again precluded early movement and the first Golden Eagles did not appear until 1050 and subsequent movement often involved prolonged periods of soaring flight making migrants on occasion difficult to distinguish from resident birds. Movement was again fairly slow and steady with peak movement of 16 birds from 1400 to 1500, and the last Golden Eagles went north at 1911. The first Sharp-shinned Hawk of the season sped to the north at 1439, and 4 adult Red-tailed Hawks (1 dark harlani, 3 light calurus) was the highest count so far. The Golden Eagle at 1872 was the 2000th of the season, and the total of 62 birds included 4 subadults and 3 juveniles, the highest percentage of immature birds so far. The season’s total of 277 Bald Eagles now exceeds by one the highest ever complete spring count at
Tuesday, March 25, 2008
March 25 [Day 34] The cold air persisted with a low of -12C and a high of just 2C again. Winds were light until 1305 when moderate SW winds in the valley and W winds at ridge level developed. It was cloudless until 1300 when cumulus cloud moved from the west reaching 70% at 1800. The first migrant, a Bald Eagle did not appear until 1108 and movement was generally slow and sporadic thereafter with maximum passage of 18 birds from 1600m to1700, and the last Golden Eagle went north at 1916. The first Northern Harrier of the season, an adult male, was seen at 1614. Passerine migrants included 80 Bohemian Waxwings, 40 Grey-crowned Rosy Finches, 1 cismontanus (the first of the season) and 1 montanus Dark-eyed Juncos, and 2 (probable) California Gulls high over the
Monday, March 24, 2008
March 24 [Day 33] Winds were strong gusting over 80 km/h SW in the valley and NW to WNW on the ridge, moderating only after 1700. There was 5 cm of fresh snow on the ground and blowing snow was a problem until mid-morning. The temperature rose to 2C from a low of -4C, and cloud cover was mainly cumulus ranging from 80% at 1400 down to 5% by 1950. Raptor movement started late with the first Golden Eagle not appearing until 1038 and was very sporadic until after 1300 with a maximum movement of 29 birds from 1600 to 1700. No raptor was seen for almost an hour after 1802, but then 6 birds moved after 1900 with the last migrant Golden Eagle still moving north at 1940, the latest so far this season. With the exception of the first juvenile Northern Goshawk seen this season, all the migrant raptors were adults. 12.33 hours (348.7) BAEA 13 (264), NOGO 3 (52), GOEA 79 (1882) TOTAL 95 (2234)
Sunday, March 23, 2008
March 23 [Day 32] Winds were moderate to strong all day, and the temperature rose briefly to 5C from a low of -2C. Cloud cover was initially altostratus and cumulus with low stratus developing after 1400 that gradually enveloped the mountains as light snow became steady moderate snow after 1600, and by 1640 everything was obscured. Two Golden Eagles moved along the Livingstone Ridge at 0740, the earliest yet, and 2 more before 0800, and migration became steady after 1100 peaking between 1300 and 1400 when 20 birds moved. The last Golden Eagle was seen at 1535 as the peaks were beginning to be shrouded in cloud. A male Mountain Bluebird at 0944 was the first for the year and a flight of 10 Mallard at 1139 was a first record for the site. 10 hours (336.3) BAEA 4 (251), NOGO 3 (49), RTHA 1 (9), GOEA 71 (1803), PRFA 1 (3) TOTAL 80 (2139)
Saturday, March 22, 2008
March 22 [Day 31] Apart from 10% cumulus at 0800 and a wash of thin cirrostratus after 1900 the sky was cloudless all day. Despite the sunshine the temperature only rose to 4C from a low of -4C, and winds were moderate NW-SW becoming light after 1800. The first migrant flapped heavily to the north at 0916, and it was only after 1030 that air conditions allowed buoyant gliding flight. Movement thereafter was steady, albeit sporadic, with periods of up to 20 minutes with no birds followed by a concentrated burst of migrants. Eleven birds moved after 1900 with the last Golden Eagle gliding north at 1935. The total of 21 Bald Eagles was the second highest total for the season so far and the highest since March 9. An adult dark morph Harlan’s Red-tailed Hawk at 1828 was the first for the season. Display activity of the resident Golden Eagles was again concentrated around the
Friday, March 21, 2008
March 21 [Day 30] Winds were WNW-W moderate to strong all day with 40-100% generally cumulus and altostratus cloud cover. After 1700 light flurries developed from the west with a period of snow from 1840-1910 when everything was obscured. The temperature range was -3C to 3C with the wind once again making for uncomfortable viewing. Raptor movement started slowly with the first Golden Eagle at 0858 and the rate only increased between 1500 and 1800 when 118 of the day’s 194 migrants moved. Just when it was looking like it would be a new season-high count the snow started and after it finished only two more birds went north: a Golden Eagle at 1924 and the second Merlin of the season at 1932. The resident Golden Eagle pair was obvious for much of the day, including displays over both nest sites: on two occasions the birds were observed to touch talons, but did not grasp. The only apparent passerine migrants were a total of 49 Grey-crowned Rosy-Finches, and the first Varied Thrush of the season sang briefly at 0821. 12 hours (314.1) BAEA 7 (226), NOGO 6 (42), RTHA 1 (7), RLHA 1 (11), GOEA 178 (1627), MERL 1 (2) TOTAL 194 (1928)
Thursday, March 20, 2008
March 20 [Day 29] Winds were moderate to strong WNW-W all day with 20-90% mainly cumulus cloud cover assisting detection of high-flying birds. Temperatures ranged from -4C to 5C but again the wind made for chilly observing. The first Golden Eagle moved high to the north at 0753 (the earliest yet) and the last was at 1924: 11hours and 31 minutes later. The pace of movement was remarkably consistent after 1000 with the highest hourly count only being 20 birds between 1800 and 1900. All of the 131 Golden Eagles counted were adults. The resident Golden Eagles were again in evidence and displaying all day, mainly to the north, and I managed to locate what is likely to be the active aerie high on a south facing buttress of what we call
Wednesday, March 19, 2008
March 19 [Day 28] Early calm and cloudless conditions gave way after 1000 to moderate SW-W winds with variable amounts of altostratus and cumulus cloud for the rest of the day. Temperatures ranged from -4C to 4C, but the wind made it feel much cooler. The first migrant was at 0820 but movement was relatively slow until after 1300 after which migration was steady until 1835 when it suddenly stopped. The busiest hour was 1300-1400 when 38 birds moved. The highlights were first RMERF March records for Ferruginous Hawk (a light morph adult at 1407) and American Kestrel (an adult male at 1430), and the second Gyrfalcon of the season at 1648. The resident pair of Golden Eagles was conspicuous all day with the first display flight seen at 0755 and the last at 1920. Most of the display is now over the
Tuesday, March 18, 2008
March 18 [Day 27] The early morning was calm with cloud covering much of the
Blog Archive
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2008
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May
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- May 19 [Day 84] Drizzle and light rain began as I ...
- May 18 [Day 83] Although the forecast called for w...
- May 17 [Day 82] This was the warmest day yet with ...
- May 16 [Day 81] From a low of 12C the temperature...
- May 15 [Day 80] The temperature rose to a season-h...
- May 14 [Day 79] The day started out rather as yest...
- May 13 [Day 78] Another 1 cm of snow fell overnigh...
- May 12 [Day 77] There was 10 cm of fresh snow on t...
- May 11 [Day 76] I returned home from the Gala at 0...
- May 10 [Day 75] (Vance) The winds were W and occas...
- May 9 [Day 74] The day started with heavy wet snow...
- May 8 [Day 73] I again watched from the Valley Vie...
- May 7 [Day 72] After having been soaked the day be...
- May 6 [Day 71] Conditions were calm until noon whe...
- May 5 [Day 70] Winds were again westerly all day, ...
- May 4 [Day 69] (Bill) Winds were westerly all day ...
- May 3 [Day 68] (Bill) West winds gusting to 20 km/...
- May 2 [Day 67] It was a rare calm day on the ridge...
- May 1 [Day 66] Again the weather forecast was comp...
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April
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- April 30 [Day 65] So much for the weather forecast...
- April 29 [Day 64] I started the day on the ridge b...
- April 28 [Day 63] We finally made it to the ridge ...
- April 27 [Day 62] The day started where it left of...
- April 26 [Day 61] After the worst week’s weather w...
- April 25 [Day 60] The ridges were clear until 0800...
- April 24 [Day 59] Prospects again looked poor earl...
- April 23 No observation. All ridges were clear unt...
- April 22 [Day 58] The forecast called for yet more...
- April 21 No observation. Snow showers and flurries...
- April 20 No observation. Snow all day with all rid...
- April 19 No observation. Snow all day with all rid...
- April 18 [Day 57] There were periods of wet snow a...
- April 17 [Day 56] A conspicuous Chinook Arch to th...
- April 16 [Day 55] At -8C it was the coldest start ...
- April 15 [Day 54] The day started with a light sn...
- April 14 [Day 53] A brief shower ending at 0740 wa...
- April 13 [Day 52] At 0700 the temperature was 9.5C...
- April 12 [Day 51] It was the warmest day so far th...
- April 11 [Day 50] (Raymond and Denise) The tempera...
- April 10 [Day 49] The temperature rose to 6C from ...
- April 9 [Day 48] It was again a pleasant day with ...
- April 8 [Day 47] A pleasant day with ground winds ...
- April 7 [Day 46] Winds at ridge level were W mode...
- April 6 [Day 45] The forecasted 70 km/h winds did ...
- April 5 [Day 44] Another pleasant day with a tempe...
- April 4 [Day 43] At last, a spring-like day, with ...
- April 3 [Day 42] Winds were again moderate to stro...
- April 2 [Day 41] The weather remains cool with the...
- April 1 [Day 40] The starting temperature was -10C...
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March
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- March 31 [Day 39] It was -16C under a cloudless sk...
- March 30 [Day 38] It was an encouraging start to t...
- March 29 No observation. Heavy wet snow until late...
- March 28 [Day 36] (Raymond and Dawn) It was a rema...
- March 27 [Day 36] Winds aloft were moderate to str...
- March 26 [Day 35] It was the most pleasant day in ...
- March 25 [Day 34] The cold air persisted with a lo...
- March 24 [Day 33] Winds were strong gusting over 8...
- March 23 [Day 32] Winds were moderate to strong al...
- March 22 [Day 31] Apart from 10% cumulus at 0800 a...
- March 21 [Day 30] Winds were WNW-W moderate to str...
- March 20 [Day 29] Winds were moderate to strong WN...
- March 19 [Day 28] Early calm and cloudless conditi...
- March 18 [Day 27] The early morning was calm with ...
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