BirdAnalyst
BBS Route · Alaska · BCR 4

Nicholai Sl Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 73 species recorded across 31 survey years, still active.

73Species 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 →
31Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1993–2025Span
2Observers

Bird Species Found on Alaska Nicholai Sl

Top 40 of 73 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 ThrushTurdidae752025-20%1995
Northern WaterthrushParulidae362025-29%1995
Alder FlycatcherTyrannidae342025+127%1995
Wilson's SnipeScolopacidae252025-27%1995
Common GoldeneyeAnatidae222025+700%1996
BuffleheadAnatidae162025+675%1996
Orange-crowned WarblerParulidae162025-5%1995
Canada JayCorvidae142025+20%1995
Spotted SandpiperScolopacidae132025-55%1995
Olive-sided FlycatcherTyrannidae132025-43%1995
Greater White-fronted GooseAnatidae122025+329%1995
Lesser YellowlegsScolopacidae122025-28%1995
Short-billed GullLaridae112025+129%1995
Northern PintailAnatidae112024-18%1999
Varied ThrushTurdidae112025-16%1995
Fox SparrowPasserellidae102025-15%1995
Gray-cheeked ThrushTurdidae102025+14%1995
Common RavenCorvidae102025+54%1996
White-crowned SparrowPasserellidae92025+42%1995
American RobinTurdidae82025-18%1995
White-winged CrossbillFringillidae72023-37%1995
Yellow WarblerParulidae72025-40%1995
MallardAnatidae72019+75%2000
Herring GullLaridae62018+22%1999
Red-necked GrebePodicipedidae42025-9%1995
Boreal ChickadeeParidae42019-14%1995
Bohemian WaxwingBombycillidae42021+0%2000
Ruby-crowned KingletRegulidae42025-45%1996
Trumpeter SwanAnatidae42025+220%1999
Lincoln's SparrowPasserellidae42025+67%1999
American WigeonAnatidae32025-47%1995
Solitary SandpiperScolopacidae32022-65%1995
Pine GrosbeakFringillidae32002+60%1998
Blackpoll WarblerParulidae32025+50%1995
Red-breasted MerganserAnatidae21999+0%1994
Sandhill CraneGruidae22025-50%1995
Red-tailed HawkAccipitridae22017+0%1995
Belted KingfisherAlcedinidae22025-68%1995
Tree SwallowHirundinidae22024+0%1995
Arctic TernLaridae22002+100%1994

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