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BBS Route · Alaska · BCR 4

Cottonwood Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 50 species recorded across 4 survey years, no longer active.

50Species 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 →
4Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1987–1990Span
2Observers

Bird Species Found on Alaska Cottonwood

Top 40 of 50 species by most recent count. Each links to its species trend.

Species recorded on the Cottonwood 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 FlycatcherTyrannidae931990+8%1988
American RobinTurdidae371990+67%1988
Tree SwallowHirundinidae361990+21%1988
White-winged CrossbillFringillidae281988+300%1987
Orange-crowned WarblerParulidae281990-13%1988
MallardAnatidae23198823×1987
Canada GooseAnatidae231989+360%1988
Short-billed GullLaridae20199032×1988
White-crowned SparrowPasserellidae171990-41%1988
Black-capped ChickadeeParidae111990+77%1988
Swainson's ThrushTurdidae101990-39%1988
Northern WaterthrushParulidae81990-37%1988
Savannah SparrowPasserellidae71990-12%1988
Lincoln's SparrowPasserellidae41990-20%1988
Varied ThrushTurdidae41990-8%1988
Common GoldeneyeAnatidae41990+300%1989
Glaucous-winged GullLaridae31990-50%1987
Wilson's SnipeScolopacidae31990-11%1988
Black-billed MagpieCorvidae31990+6%1988
Fox SparrowPasserellidae31990-45%1988
Violet-green SwallowHirundinidae31989-89%1987
Blackpoll WarblerParulidae31990-77%1988
Ruby-crowned KingletRegulidae31990-25%1988
Wilson's WarblerParulidae31988n/an/a
Bonaparte's GullLaridae31990n/an/a
Green-winged TealAnatidae21987n/an/a
Solitary SandpiperScolopacidae21990+100%1987
Olive-sided FlycatcherTyrannidae21989-33%1987
Bank SwallowHirundinidae21990-77%1988
Sandhill CraneGruidae21989-60%1988
Arctic TernLaridae11987n/an/a
Lesser YellowlegsScolopacidae11990-73%1988
Rough-legged HawkAccipitridae11987n/an/a
Western Wood-PeweeTyrannidae11990-78%1988
Canada JayCorvidae11988-50%1987
Common RavenCorvidae11990-50%1987
Cliff SwallowHirundinidae11990-44%1988
Gray-cheeked ThrushTurdidae11990+0%1987
Red-necked GrebePodicipedidae11990-93%1988
Common LoonGaviidae11990+0%1988

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