Overview
The 42nd Eastside Audubon CBC was held on Saturday, December 14, 2024. The weather was partly cloudy with temperatures rising to about 50 degrees. We had some light rain, but it was windy in some areas with gusts close to 30 mph. We believe the counts for chickadees, bushtits, sparrows and other perching birds were kept down by the windy conditions.
The species count of 93 on count day was lower than the 10-year average of 98 species for our count circle. A review of eBird postings from within the count circle found 6 additional count week species to bring the count total to 99 bird species for the week. Eastside Audubon had an excellent group of 64 volunteers who recorded 15,618 individual birds which is 91% of the 20-year average of 17,104. This is the lowest count since the 2019 Covid-19 count, and before that, the 2015 count.
Eastside Audubon recruited 61 volunteers to fill 15 teams. Of the 15 field teams, one had eleven members. For the first time Eastside Audubon had a youth contingent of five volunteers under age 18, accompanied by two others over 18, and two parent/drivers. We hope to build on this young-birders group in future CBCs. For other teams, one had seven members, and one had five. Two teams had four members, and seven teams had three members. There were two two-member teams, and one leader birded alone.
Data Assessment
Variability in count numbers from year to year can be a challenge to interpret. Differences in weather conditions, changes in effort due to the number and skill level of volunteers on field teams, and changes in habitat due to natural causes (e.g., storms, fire) or human development may all contribute to changes in bird species count totals. The CBC uses the 10-year average as one yardstick to provide some context for a particular year’s count totals. The numbers in parentheses following the name of a bird in this report are the total number seen in this year’s CBC, and the percentage as a ratio of the species count to the species’ 10-year average (e.g., a percentage of 100% indicates a match of the 10-year average, 150% indicates a 50% increase over the current 10-year average, and 70% indicates 70% of the 10-year average.).
Highlights
A Pine Grosbeak was seen for the first time on the EAS CBC. It was found in Redmond, photographed, and posted to eBird. One Red Crossbill was heard by a home feeder watcher who confirmed the call with the Merlin app. A flock of 30 Snow Geese was observed in the Snoqualmie Valley. This was the largest count of Snow Geese on the Eastside Audubon CBC. A total of seven Northern Harriers was the highest recorded on our CBC.
Trends
Ducks and Geese
Waterfowl numbers continue their annual variation. Cackling Geese dropped from previous high years (4901, 85%), as did Canada Geese (769, 66%). I am beginning to believe that the high counts of 2018-2020, the COVID-19 years may have been due to fewer people and reduced activity in the Snoqualmie Valley during those years, but we may never know for certain. The count for these two species is down by 50% from those years.
Canvasback (24, 267%) repeated their good showing again this year. For decades, Canvasback numbers were in single digits, and we do not know how to account for the increase in the last two CBCs. For the second year in a row, Ring-necked Ducks (201, 123%) were above the 10-year average. American Wigeon (320, 108%), Green-winged Teal (94, 95%), Hooded Merganser (55, 89%), and Northern Shoveler (36, 106%) were all close to their 10-year average. However, Wood Duck (16, 67%), Mallard (588, 56%), and Common Merganser (38, 46%) were far below their 10-year average. The large number of Northern Pintails in 2023 (189) was an aberration, but the count of only four this year is just as aberrant (4, 5%) showing a surprising volatility in the numbers for pintail. Counts of one Lesser Scaup and no Greater Scaup were disappointing. Also absent was Barrow’s Goldeneye, and Common Goldeneye (7, 44%) was far below the 10-year average.
Grebes, Pigeons, Hummingbirds, Coots, and Rails
Pied-billed Grebes (64, 84%) held steady this year, but Western Grebes (27, 60%) were low. There were no Red-necked Grebes counted this year. For the second year in a row, we counted seven Virginia Rails (7, 117%). Anna’s Hummingbirds were in a steep drop (38, 43%) below their 10-year average of 88. Mouning Doves (42, 191%) did well again at nearly two times their 10-year average. Rock Pigeons (155, 124%) were present as usual. However, Eurasian Collared-Doves tanked (5, 13%), and we dipped on Band-tailed Pigeon.
Gulls, Cormorants, and Herons
Short-billed Gulls (109, 24%) rebounded some but are far below their 10-year average. Observers reported high winds on Lake Sammamish which undoubtedly impacted the count of birds in that area. Glaucous-winged Gulls (110, 93%) and Ring-billed Gulls (22, 92%) were present in usual numbers. They typically hang out closer to shore. California Gulls (10, 200%) were around the lake on count day. Double-crested Cormorants (129, 93%) maintained their presence. Great Blue Herons (34, 76%) remained below their 10-year average. One Green Heron was found along Issaquah Creek.
Shorebirds
The wonderful flock of 42 Wilson’s Snipe in 2023 was followed up this year by only one snipe being counted. Killdeer (5, 13%) were also in low numbers. One Spotted Sandpiper was seen.
Raptors and Owls
Fifty-one Bald Eagles (51, 128%) were the most since 50 were seen in 2019 and 61 in 2016. Red-tailed Hawks (38, 100%) were seen in average numbers. Northern Harriers (7, 233%) doubled their 10-year average. Four Cooper’s Hawks (4, 80%), one Sharp-shinned Hawk (1, 100%), and two unidentified accipiters completed the count for that genus. American Kestrel (9, 150%) made another nice showing above their 10-year average. Kestrels were counted in double-digits in three of the previous five years. A Great Horned Owl and a Barn Owl were reported on count day. After a bonus year in 2023, Barred Owl was seen this year only in count week.
Woodpeckers, Kingfisher, and Shrike
Northern Flicker (73, 79%), Downy (18, 64%), Hairy (9, 69%), and Pileated Woodpeckers (2, 29%) all fell back and were below their 10-year averages. Red-breasted Sapsuckers (2, 33%) continued their decline on our count to such an extent that their 10-year average has declined from nine in 2018 to six this year. We have no information about why their numbers appear to be declining. Belted Kingfisher (13, 108%) was back to its average count.
Corvids
American Crows (1635, 145%) nearly doubled last year’s count. Common Ravens (10, 53%) dropped precipitously to the lowest count after 12 years of double-digit counts with a high of 27 in 2023. Steller’s Jays (45, 44%) also declined to less than half their average. With no one available to climb Tiger Mountain we were unable to document the presence of Canada Jays this year.
Chickadees, Nuthatches, and Creepers
Black-capped (244, 76%) and Chestnut-backed Chickadees (145, 93%) moved back to average numbers. Bushtits (63, 46%) dropped to half their 10-year average numbers. Red-breasted Nuthatches (51, 146%) showed well, and Brown Creepers (19, 79%) maintained close to their average count.
Thrushes and Warblers
Varied Thrushes (22, 56%) and American Robins (447, 84%) were somewhat below their average numbers. No Hermit Thrushes were seen this year. After a banner year in 2023 Yellow-rumped Warblers (5, 63%) and Townsends Warbler (1, 25%) were below average.
Finches
Numbers for finches can be unpredictable, and this year’s totals are no exception. Pine Siskin (699, 135%) appear to be in an irruption year. Purple Finch (22, 79%) and American Goldfinch (59, 109%) both rebounded and House Finch (119, 87%) came close to their 10-year average. One Red Crossbill was heard but Evening Grosbeaks eluded our observers.
Sparrows
Dark-eyed Juncos (613, 77%) stayed close to average range after flying high at 1,387 in 2022. Sparrow numbers were down overall. Fox Sparrows (25, 51%) and Song Sparrows (114, 52%) remained well below average. However, Golden-crowned Sparrows (103, 90%), White-crowned Sparrows (45, 102%) stayed steady. Spotted Towhees (79, 53%) dropped by almost half of their count for the past two years. Lincoln Sparrow (2, 67%) and White-throated Sparrow (Count Week only) are regular but in low numbers on our count.
Blackbirds
Red-winged Blackbirds (470, 107%) improved slightly over the past two years. Brown-headed Cowbirds (7, 50%) showed up. Brewer’s Blackbird and Western Meadowlark made count week.
Count Week Birds
Six Count Week birds brought our total bird species count to 99. Common Loon and Cedar Waxwing were found in Marymoor Park, Barred Owl in Bellevue, Western Meadowlark on Neal Road, Fall City, White-throated Sparrow in Redmond, and Brewers Blackbird at Sikes Lake were posted on eBird checklists from within our count circle during the three days before and three days after our count day.
I am grateful for all our volunteer team members and feeder watchers who completed the count of birds in our count circle. Thank you all for your dedication to the birds and for collecting important information which I have sent to National Audubon.
Andy McCormick, CBC Compiler
Eastside Audubon
Washington