The 106 Christmas Bird Count in Canada The 106 Christmas Bird
Transcription
The 106 Christmas Bird Count in Canada The 106 Christmas Bird
Christmas Bird Count th The 106 Christmas Bird Count in Canada 14 December 2005 to 5 January 2006 Report by Dick Cannings Photo: Dick Cannings T he number of Canadian Christmas Bird Counts escalated again this year, with 363 counts, up from last year's record 355. Volunteer participation also grew by 300 people to 12,130. The number of individual birds reported bounced back by about 5 percent to 3.2 million, while the species total dropped to 289 from last year's record high of 300. Table 1 summarizes provincial and territorial counts. Halifax set the standard for results this year with 135 species, an all-time high for any count east of the Pacific coast, and coming close to this year's Canada-high count of 140 species at Ladner, BC. In Alberta, Calgary dropped to 65 species and rival Edmonton reported only 52 species this year. Blenheim reported 111 species for the best in Ontario and second best for an inland count. Oliver-Osoyoos, BC tied their own previous high with a respectable 112 species. The largest increase in species numbers came from Nunavut, where for the last five years only one or two species had been reported. This year their three counts combined for an amazing five species: Common Eider, Willow and Rock ptarmigan, Common Raven, and House Sparrow. As indicated in Table 2, there were significant changes in the reported numbers of several of Canada's most common winter bird species. Junco and Bohemian Waxwing totals were about twice the highest totals in the last three years, while starlings, crows, Mallards, House 10 BIRDWATCH CANADA House Sparrow/Moineau domestique Photo: Ralph Hocken Ruby-crowned Kinglet/Roitelet à couronne rubis Photo: Ralph Hocken Black-capped Chickadee/Mésange à tête noire Photo: Harold Stiver Blue Jay/Geai bleu Photo: Ron Ridout Sparrows, and the two large gulls also increased, reversing short-term declines. Reported numbers of Dunlin were way down, but almost all Dunlin seen in Canada come from two adjacent BC counts (Ladner and White Rock), so local conditions (e.g., tides, weather) could play a role in any changes. American Crow and Blue Jay numbers were the highest in years, seeming to dispel any worries that West Nile Virus (WNV) would have lasting population effects on these two species. Reported totals of Black-capped Chickadee, another Common Redpoll/Sizerin flammé Photo: Christian Artuso Bald Eagle/Pygargue à tête blanche Photo: Harold Stiver the local volunteer compilers who work tirelessly to organize all the Christmas Bird Counts, then gather, edit, and enter the numbers into a database. We rely heavily on their collective wisdom to make this project the success that it has become. With that in mind, it is with sadness that I report the passing of three count compilers: Phil Gehlen of Vernon, BC, Chris Sanders of Sault Ste. Marie, ON, and Charlie Whitelaw of Sudbury, ON. Their dedication over the years contributed immensely to our knowledge of local bird populations. They will be missed. REPORT count of 52. Snowy Owls moved south in large numbers, with 225 seen on 74 counts, almost twice last year's good numbers. The biggest concentration was on the Fraser River delta at Ladner, BC, where 24 were seen. Great Gray and Northern Hawk Owls were also widely reported, but numbers were well down from last year's extraordinary invasion. Rarities always play an exciting role in Christmas Bird Count tallies. Three species were seen for the first time on Canadian Christmas Bird Counts this year – Buller's Shearwater in Hecate Strait, BC, LeConte's Sparrow in Kingston, ON, and a Blue Grosbeak at Fredericton, NB. The all-time Canada species list for Christmas Bird Counts now stands at an impressive 404 species! In addition to all the wonderful participants, I would like to heartily thank NATIONAL species reportedly highly susceptible to WNV, also increased this year. Black-capped Chickadee, Hairy and Downy Woodpecker, and Common Raven shared top billing once again for the most widely distributed birds on Canadian counts (Table 3). Common Redpoll dropped off the top-15 lists this year, typical of its biannual movements into southern Canada, moving down to 18th place in terms of number of counts and 34th place in terms of abundance. Bald Eagles were seen on 258 counts, continuing their winter population expansion. One of my favourite Christmas moments this year happened at Vaseux Lake in southern BC, where my son, Russell, and I decided to do a diligent search for Northern Saw-whet Owls. We were aiming to beat the Canadian record of 26 held by Edmonton, but far exceeded our expectations with a Northern Saw-whet Owl/Petite Nyctale Photo: Ethan Meleg Table 1/Tableau 1 106th Christmas Bird Count Summary/Résume du 106e Recensement des oiseaux de Noël Counts/ Nbre de décomptes AB BC MB NB NL NS NWT NU ON PE QC SK SPM YT TOTAL 44 84 19 12 11 22 3 3 106 3 25 22 2 7 363 Field Observers/ Feeder-watchers/ Nbre de participants Nbre d'observateurs sur le terrain d'oiseaux de mangeoires 1040 773 2173 492 318 126 228 88 139 40 490 474 42 3 5 2 2707 1768 46 8 524 123 302 83 21 0 79 36 8114 4016 Species/ Nbre d'espèces 111 228 74 114 113 171 22 5 175 74 132 90 61 35 289 Highest Species Total Number of Individuals/ Nbre d' oiseaux and Count/Plus grand nombre d'espèces et décompte 65, Calgary 68,145 140, Ladner 1,112,522 45, Winnipeg 52,296 68, Grand Manan 60,073 70, St. John's 45,364 135, Halifax-Dartmouth 216,667 15, Fort Simpson 2616 3, Arviat & Rankin Inlet 115 111, Blenheim 1,367,023 52, Hillsborough 20,828 68, Montreal 201,057 40, Gardiner Dam & Saskatoon 72,116 45, St-Pierre et Miquelon Isl. 9331 23, Whitehorse 3541 3,231,694 SUMMER 2006, NUMBER 36 11 Table 2/Tableau 2 Top 15 Bird Species/Les 15 espèces les plus nombreuses au pays Total 106th Count/ Total (106e RON) European Starling/Étourneau sansonnet 371,437 American Crow/Corneille d'Amérique 250,642 Mallard/Canard colvert 227,869 Canada Goose/Bernache du Canada 204,373 Dark-eyed Junco/Junco ardoisé 147,384 Bohemian Waxwing/Jaseur boréal 146,750 Black-capped Chickadee/Mésange à tête noire 140,971 House Sparrow/Moineau domestique 137,371 Rock Pigeon/Pigeon biset 127,302 Glaucous-winged Gull/Goéland à ailes grises 119,326 American Wigeon/Canard d'Amérique 92,111 Herring Gull/Goéland argenté 81,281 Snow Bunting/Bruant des neiges 73,447 Mourning Dove/Tourterelle triste 59,632 Dunlin/Bécasseau variable 56,576 Species/Espèces Total 104rd Count/ Total (104e RON) 334,702 213,781 205,199 233,240 76,671 65,946 129,437 147,013 115,158 73,825 91,064 81,439 41,253 49,499 107,972 Total 105th Count/ Total (105e RON) 283,449 201,882 170,692 224,129 74,841 55,465 121,104 129,680 106,892 81,996 58,820 75,395 85,572 44,843 92,531 Total 103rd Count/ Total (103e RON) 445,741 249,382 222,468 267,320 67,045 38,344 112,361 134,638 138,770 120,582 75,970 98,361 41,655 56,127 99,885 A Short History of the Christmas Bird Count Downy Woodpecker/Pic mineur Photo: Ron Ridout The first-ever Christmas Bird Count (CBC) was held on Christmas Day in 1900. It began as an alternative to the “side hunt,” an event wherein a series of teams went out and shot as many birds as possible. The team that shot the most birds won the event. As an option to the “side hunt,” and recognizing that bird populations could not be sustained forever, Frank Chapman, a famed ornithologist at the American Museum of Nature, organized the CBC with fellow ornithologists and friends. Now, 106 years and 60,000 volunteers later, the renowned CBC tradition is one of the largest annual collective bird counts in North America. Bohemian Waxwing/Jaseur boréal Photo: Christian Artuso Table 3/Tableau 3 Most widespread species on Canadian Christmas Counts/Liste des 15 espèces les plus répandues au pays Species/Espèces Black-capped Chickadee/Mésange à tête noire Downy Woodpecker/Pic mineur Hairy Woodpecker/Pic chevelu Common Raven/Grand Corbeau European Starling/Étourneau sansonnet Red-breasted Nuthatch/Sittelle à poitrine rousse Rock Pigeon/Pigeon biset House Sparrow/Moineau domestique Bald Eagle/Pygargue à tête blanche American Crow/Corneille d'Amérique Blue Jay/Geai bleu Dark-eyed Junco/Junco ardoisé Mallard/Canard colvert White-breasted Nuthatch/Sittelle à poitrine blanche American Goldfinch/Chardonneret jaune 12 BIRDWATCH CANADA No. of counts/ Nbre de décomptes 323 323 321 316 296 292 284 283 258 250 249 241 235 231 227 Rank 106 / Rang (106e) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 Rank 105/ Rang (105e) 2 1 3 4 8 7 10 9 13 12 11 6 15 20 21 Rank 104/ Rang (104e) 2 3 1 4 6 5 10 8 14 12 11 9 16 13 20 Rank 103/ Rang (103e) 1 2 3 4 5 8 7 6 14 11 9 10 11 20 17