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BBS Route · Alaska · BCR 5

Thorne Bay Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 71 species recorded across 21 survey years, no longer active.

71Species 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 →
21Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1989–2012Span
5Observers

Bird Species Found on Alaska Thorne Bay

Top 40 of 71 species by most recent count. Each links to its species trend.

Species recorded on the Thorne Bay 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
Hermit ThrushTurdidae602012+38%1991
Pacific WrenTroglodytidae572012+188%1991
Townsend's WarblerParulidae55201215×1991
Swainson's ThrushTurdidae432012+235%1991
Varied ThrushTurdidae362012+147%1991
Pine SiskinFringillidae352012+109%1991
Orange-crowned WarblerParulidae302012+144%1992
Common RavenCorvidae212012-18%1991
American RobinTurdidae212012+239%1991
Red-breasted SapsuckerPicidae192012+543%1992
Harlequin DuckAnatidae181994+6%1993
Boreal ChickadeeParidae151991n/an/a
Golden-crowned KingletRegulidae92012+24%1991
Blackpoll WarblerParulidae91990n/an/a
Marbled MurreletAlcidae92012-42%1995
Red CrossbillFringillidae82010-87%1994
Chestnut-backed ChickadeeParidae72012-29%1991
American CrowCorvidae52012-15%1991
Fox SparrowPasserellidae52010-22%1991
Downy WoodpeckerPicidae41991n/an/a
Canada JayCorvidae41991n/an/a
Townsend's SolitaireTurdidae42012+33%1991
Black ScoterAnatidae31989n/an/a
Bald EagleAccipitridae32012-39%1991
Belted KingfisherAlcedinidae32012-10%1992
White-winged CrossbillFringillidae31998+50%1990
Song SparrowPasserellidae32012-83%1992
MacGillivray's WarblerParulidae31990n/an/a
Short-billed GullLaridae32012-25%1991
Steller's JayCorvidae32012+0%1993
Hairy WoodpeckerPicidae22008-69%1993
White-crowned SparrowPasserellidae21990n/an/a
Golden-crowned SparrowPasserellidae21990n/an/a
Common LoonGaviidae22012+0%1992
Common MerganserAnatidae22001+0%1993
Rufous HummingbirdTrochilidae22007-38%1999
Ring-necked DuckAnatidae22002-33%1992
Pine GrosbeakFringillidae22005+100%2001
Gray-crowned Rosy-FinchFringillidae11989n/an/a
Chipping SparrowPasserellidae12003+0%1989

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