BirdAnalyst
BBS Route · Alaska · BCR 4

Nicholai Sl Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 71 species recorded across 30 survey years, still 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 →
30Years 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
2Observers

Bird Species Found on Alaska Nicholai Sl

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

Species recorded on the Nicholai Sl 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
Swainson's ThrushTurdidae802024-15%1995
Alder FlycatcherTyrannidae472024+156%1995
Northern WaterthrushParulidae382024-9%1995
Wilson's SnipeScolopacidae232024-21%1995
Canada JayCorvidae182024+49%1995
American WigeonAnatidae142024-9%1995
American RobinTurdidae122024+18%1995
Northern PintailAnatidae112024-18%1999
White-crowned SparrowPasserellidae102024+16%1995
Orange-crowned WarblerParulidae102024-3%1995
Spotted SandpiperScolopacidae92024-62%1995
Common RavenCorvidae92024-15%1996
Fox SparrowPasserellidae82024-5%1995
Common GoldeneyeAnatidae82024+417%1996
White-winged CrossbillFringillidae72023-37%1995
MallardAnatidae72019+75%2000
BuffleheadAnatidae62022+300%1996
Yellow WarblerParulidae62024-40%1995
Varied ThrushTurdidae62024-20%1995
Trumpeter SwanAnatidae62024+240%1999
Herring GullLaridae62018+22%1999
Olive-sided FlycatcherTyrannidae52024-46%1995
Black-capped ChickadeeParidae42024+200%2002
Boreal ChickadeeParidae42019-14%1995
Bohemian WaxwingBombycillidae42021+0%2000
Short-billed GullLaridae32024-14%1995
Greater White-fronted GooseAnatidae32024+386%1995
Lesser YellowlegsScolopacidae32024-53%1995
Solitary SandpiperScolopacidae32022-65%1995
Belted KingfisherAlcedinidae32024-68%1995
Pine GrosbeakFringillidae32002+60%1998
Bank SwallowHirundinidae32022+100%1995
Blackpoll WarblerParulidae32024+163%1995
Gray-cheeked ThrushTurdidae32024-36%1995
Ruby-crowned KingletRegulidae32024-20%1996
Red-necked GrebePodicipedidae22024-9%1995
Red-breasted MerganserAnatidae21999+0%1994
Red-tailed HawkAccipitridae22017+0%1995
Tree SwallowHirundinidae22024+0%1995
Arctic TernLaridae22002+100%1994

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