For 2007, the eight Christmas
Bird Counts in the corridor netted an overall satisfactory result despite
Whistler’s downturn in numbers of species seen. In fact, that was the story
almost everywhere except Lillooet, which had less birds but more species in
their count. And that was the usual picture elsewhere throughout B.C. except
Nanaimo, Duncan and Osoyoos, which enjoyed near record counts for numbers and
species seen.
The villain was probably the
stormy weather of early December which drove many species south of the border.
The following stats were
registered in the Sea to Sky corridor: Lower Howe Sound – 15,934 birds, a low
76 species; Squamish – 11,902 birds and 72 sp; Whistler – 2,659 birds and 42
sp; Pemberton/Mt. Currie – 2,883 birds and 59 sp; D’Arcy/Birken – 964 birds and
44 sp; Lillooet – 2,066 birds and 65 sp; Hat Creek Valley (Upper) – 581 birds
and 37 sp;
and Ashcroft/Cache
Creek – 3,537 birds and 41 sp. Species counts include those seen on three days
either side of count day, which for Whistler was nine, and in the case of Lower
Howe Sound, nil. That is, Whistler and Hat Creek fared the worst on count day!
In comparison, the number of
species seen throughout the corridor was 132, one more than last year, and
40,502 counted birds which was almost a whopping 8,000 more than year ago!
Over the transect, from
tidewater to interior sage brush country, there were nine species common to all
counts, one more than last year: Great blue heron (a high of 35 at Squamish),
Downy woodpecker (10 at Squamish), Hairy woodpecker (11 at Lillooet), Northern
flicker (64 at Lower Howe Sound), Common raven (348 at Cache Creek’s
landfill!), Black capped chickadee (413 at Lower Howe Sound), American dipper
(45 at Lillooet), Spotted towhee (244 at Lower Howe Sound), and Song sparrow
(166 at Lower Howe Sound). Surprisingly, of the eight in common last year, four
were not repeats this year! Bald eagle, Steller jay, Red-breasted nuthatch and
starlings were absent at one or more counts. On the opposite end of the
distribution scene, every count had at least one species not seen elsewhere.
Again, Lower Howe Sound led the parade with 22 – marine ducks, grebes,
cormorants, shorebirds, alcids, Hermit thrush, Anna’s hummingbird, Townsend’s
warbler and a way-out-of-place Great gray owl which inhabits the interior of
the province, easily their bird of the day. For Squamish it was four species of
gulls (Ring-billed being the highlight) out of the thousands counted at the
dump, a Lesser scaup duck, and a small race of Canada goose, or Cackling goose.
Whistler chipped in with the usual White-tailed ptarmigan and a rarely seen
Northern goshawk, while Pemberton served up their first record of a wintering Long-eared
owl. D’Arcy had the only Pied-billed grebe, and a much rarer Eared grebe –
about the only one in the southwestern corner of the province. Lillooet, in dry
belt country, had eight uniques: Golden eagle, Wilson’s snipe, Northern
saw-whet owl, a first Black-backed woodpecker, Pygmy nuthatch, Mountain
bluebird, White-throated sparrow and Mourning doves. Hat Creek had four good
ones, and the best was a Northern hawk owl as well as Blue (sooty) grouse,
White-breasted nuthatch and Snow bunting. Finally, Ashcroft had the only
Kestrel and a very surprising flock of Chipping sparrows which was their bird
of the day (not seen in many counts elsewhere in B.C.).
The best surprise of the Sea
to Sky counts was the resurgence in members of the finch family, 11 species in
total. Pine siskin counts were high to the south of Pemberton and White-winged
Crossbills were seen on three counts after several dry years, but notably at
Whistler. Bohemian waxwings also surged westward into the corridor reaching as
far as Pemberton, while dipper counts were much lower than normal throughout
the corridor with only 99 seen. Bald eagle counts were high despite the rapid
disappearance of salmon carcasses. In fact, the Squamish eagle count (2,166)
peaked on their count day (Dec. 16) and rapidly declined each day thereafter to
produce fewer than 1000 during Brackendale’s annual census in early January. As
for the 10 other raptor species, the sightings were spotty with a good count of
nine Red-tailed hawks at Squamish, and a broad dispersion of Sharp-shinned
hawks throughout. Owls always create interest, but none were found at Whistler.
However, seven species were seen elsewhere. The Northern pygmy owl was tallied
at four locations northeast of us, but was finally seen at Whistler near Christmas.
The other carnivorous bird of
terror is the robin-sized Northern shrike, seen at six of the eight count
centres, its prey being the ubiquitous Pine siskin (of which 1,778 padded the
number of birds seen at Whistler, and so we had the shrike!).
For the corridor as a whole,
the big volume birds are as follows: Pine siskin (6,964), Glaucous-winged gull
(5,306), Surf scoter (4,874), Bald eagle (2,390), Barrow’s goldeneye (1,953),
Bohemian waxwing (1,469), Common raven (1,210), and European starling, of
course, (1,011). None of the above numbers are surprising but 590 Rock pigeons
at Cache Creek/Ashcroft was certainly unexpected.
Undoubtedly, next year’s
survey will come up with more surprises.