BirdAnalyst
BBS Route · Alaska · BCR 4

Anchor River Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 64 species recorded across 40 survey years, still active.

64Species 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 →
40Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1983–2025Span
3Observers

Bird Species Found on Alaska Anchor River

Top 40 of 64 species by most recent count. Each links to its species trend.

Species recorded on the Anchor River 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
Fox SparrowPasserellidae352025+48%1986
American RobinTurdidae342025+70%1986
Orange-crowned WarblerParulidae272025-54%1986
Hermit ThrushTurdidae252025-20%1986
American WigeonAnatidae231995n/an/a
Alder FlycatcherTyrannidae222025-52%1986
White-winged CrossbillFringillidae202009-66%1987
Black-billed MagpieCorvidae122025+114%1986
Sandhill CraneGruidae102024+400%1986
Wilson's SnipeScolopacidae102025-26%1986
Golden-crowned SparrowPasserellidae92025-70%1986
Common RavenCorvidae82025-36%1986
Western Wood-PeweeTyrannidae72007+300%1992
Townsend's WarblerParulidae62025-56%1986
Ruby-crowned KingletRegulidae62025-74%1986
Violet-green SwallowHirundinidae62025-37%1987
Canada JayCorvidae52025-58%1986
Cliff SwallowHirundinidae52011+175%2000
Ring-necked PheasantPhasianidae52023+10%2000
Lincoln's SparrowPasserellidae42025-31%1986
Tree SwallowHirundinidae42025-70%1986
Varied ThrushTurdidae42025-95%1986
Golden-crowned KingletRegulidae42018+133%1990
Red-breasted NuthatchSittidae42024-28%1998
Boreal ChickadeeParidae32024-38%1987
American CrowCorvidae32024+0%2004
Pine GrosbeakFringillidae22017-29%1986
Pine SiskinFringillidae22025-70%1986
White-crowned SparrowPasserellidae22025-53%1986
Bank SwallowHirundinidae21994-71%1986
Blackpoll WarblerParulidae22004-86%1986
Wilson's WarblerParulidae22025-88%1986
Common MerganserAnatidae22023+0%2000
Belted KingfisherAlcedinidae22023-33%1998
Hairy WoodpeckerPicidae22003+25%1997
Steller's JayCorvidae22025-64%1997
Red-necked GrebePodicipedidae21997n/an/a
Red-tailed HawkAccipitridae12008+0%1983
Bald EagleAccipitridae12025+125%1990
Olive-sided FlycatcherTyrannidae12023-57%1986

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14. A route is a sample, not a census.