BirdAnalyst
BBS Route · Alaska · BCR 4

Willow Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 57 species recorded across 22 survey years, still active.

57Species RecordedSpecies recordedDistinct species detected on standard-protocol BBS runs here across all years on record — a measure of survey breadth, not a complete checklist.Full methodology →
22Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1993–2024Span
4Observers

Bird Species Found on Alaska Willow

Top 40 of 57 species by most recent count. Each links to its species trend.

Species recorded on the Willow route.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →Baseline yearThe first year of the smoothed window the trend is measured from. An earlier baseline means a longer record stands behind the number.Full methodology →History
Alder FlycatcherTyrannidae692024-6%1995
Swainson's ThrushTurdidae582024+26%1995
American RobinTurdidae412024+40%1995
Black-capped ChickadeeParidae392024+317%1995
White-crowned SparrowPasserellidae222024-22%1995
Lincoln's SparrowPasserellidae142024+41%1995
Northern WaterthrushParulidae112024+30%1995
Violet-green SwallowHirundinidae112024-9%1997
Ruby-crowned KingletRegulidae102024+27%1995
Common LoonGaviidae72024+300%1996
Tree SwallowHirundinidae72024-45%1995
Wilson's SnipeScolopacidae62024+57%1995
Red-breasted NuthatchSittidae62024+38%2019
Common RavenCorvidae52022-23%1996
Blackpoll WarblerParulidae52024-76%1995
Hairy WoodpeckerPicidae52019+100%2005
Orange-crowned WarblerParulidae42024-81%1995
Wilson's WarblerParulidae42019-56%1995
Varied ThrushTurdidae42024-47%1995
Canada JayCorvidae42024+200%1998
White-winged CrossbillFringillidae42023+200%1999
Western Wood-PeweeTyrannidae32024-67%1996
Sandhill CraneGruidae32024+0%1996
Boreal ChickadeeParidae32022+67%1996
Golden-crowned KingletRegulidae32017+67%1997
American Tree SparrowPasserellidae31996n/an/a
Short-billed GullLaridae22022-40%1995
Arctic TernLaridae21999-67%1994
Pine SiskinFringillidae22021-66%1995
Bank SwallowHirundinidae21994n/an/a
Bohemian WaxwingBombycillidae21998n/an/a
Red-necked GrebePodicipedidae22024+100%2001
Lesser YellowlegsScolopacidae22024+20%2009
Greater YellowlegsScolopacidae12023+0%1995
Bald EagleAccipitridae11993n/an/a
Fox SparrowPasserellidae12007+25%1995
Cliff SwallowHirundinidae12008+0%1998
Yellow WarblerParulidae12018-63%1999
Black-billed MagpieCorvidae12024-33%1996
Gray-cheeked ThrushTurdidae12007-50%1997

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.