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BBS Route · Alaska · BCR 5

Thorne Bay 2 Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 53 species recorded across 8 survey years, still active.

53Species 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 →
8Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
2013–2024Span
5Observers

Bird Species Found on Alaska Thorne Bay 2

Top 40 of 53 species by most recent count. Each links to its species trend.

Species recorded on the Thorne Bay 2 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
Townsend's WarblerParulidae942024+139%2018
Pacific WrenTroglodytidae622024+43%2017
Hermit ThrushTurdidae582024+4%2018
Swainson's ThrushTurdidae502024+55%2017
Varied ThrushTurdidae432024-22%2017
Golden-crowned KingletRegulidae422024+550%2017
Orange-crowned WarblerParulidae312024+48%2018
Chestnut-backed ChickadeeParidae262024+318%2018
Common RavenCorvidae242024+38%2017
American RobinTurdidae182024+13%2017
American CrowCorvidae152024+36%2017
Red-breasted SapsuckerPicidae142024+44%2017
Red CrossbillFringillidae132024+700%2021
Wilson's WarblerParulidae102022+400%2016
Harlequin DuckAnatidae82023n/an/a
Bald EagleAccipitridae62024+71%2017
White-winged ScoterAnatidae62017n/an/a
Belted KingfisherAlcedinidae42024+67%2016
Eurasian Collared-DoveColumbidae42024+40%2016
Steller's JayCorvidae42024+13%2021
Black-capped ChickadeeParidae42022-46%2017
Brown CreeperCerthiidae42024+100%2021
Tree SwallowHirundinidae42024+300%2023
Red-throated LoonGaviidae32024-25%2022
Pine SiskinFringillidae32024+433%2017
Common LoonGaviidae32022+200%2016
Downy WoodpeckerPicidae22017+100%2013
Ruby-crowned KingletRegulidae22024-33%2013
American Tree SparrowPasserellidae22016n/an/a
American DipperCinclidae22018+100%2016
MallardAnatidae22022-33%2017
Marbled MurreletAlcidae12024-73%2016
Common MerganserAnatidae12013n/an/a
Canada GooseAnatidae12021-50%2013
Hairy WoodpeckerPicidae12024+220%2016
Rufous HummingbirdTrochilidae12024-60%2016
Song SparrowPasserellidae12024+0%2016
Lincoln's SparrowPasserellidae12024-71%2022
Fox SparrowPasserellidae12022-67%2016
Yellow WarblerParulidae12016-50%2013

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