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BBS Route · Alaska · BCR 4

Kobuk River (Short) Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 41 species recorded across 2 survey years, no longer active.

41Species 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 →
2Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1991–1992Span
2Observers

Bird Species Found on Alaska Kobuk River (Short)

Top 40 of 41 species by most recent count. Each links to its species trend.

Species recorded on the Kobuk River (Short) 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
Bank SwallowHirundinidae561992+47%1991
Gray-cheeked ThrushTurdidae341992+48%1991
White-crowned SparrowPasserellidae301992+131%1991
Northern WaterthrushParulidae241992-31%1991
Short-billed GullLaridae22199211×1991
Fox SparrowPasserellidae191992+280%1991
Yellow WarblerParulidae181992-10%1991
Alder FlycatcherTyrannidae161992+78%1991
Varied ThrushTurdidae151992+150%1991
American Tree SparrowPasserellidae131992-24%1991
Swainson's ThrushTurdidae131992-35%1991
Wilson's SnipeScolopacidae111992-48%1991
American WigeonAnatidae101992-71%1991
American RobinTurdidae91992+350%1991
Sandhill CraneGruidae71992+133%1991
Long-tailed JaegerStercorariidae51991n/an/a
Glaucous GullLaridae51991n/an/a
Blackpoll WarblerParulidae51992+150%1991
Wilson's WarblerParulidae51992-29%1991
White-winged CrossbillFringillidae51992n/an/a
Common RavenCorvidae41991n/an/a
Rusty BlackbirdIcteridae41991n/an/a
Red-necked GrebePodicipedidae41992n/an/a
Canada GooseAnatidae41992n/an/a
Lesser YellowlegsScolopacidae31992-73%1991
Pine GrosbeakFringillidae31992-25%1991
Lapland LongspurCalcariidae31992n/an/a
Surf ScoterAnatidae21991n/an/a
Semipalmated PloverCharadriidae21991n/an/a
Least SandpiperScolopacidae21992n/an/a
Olive-sided FlycatcherTyrannidae21992n/an/a
Canada JayCorvidae21992n/an/a
Bonaparte's GullLaridae11991n/an/a
Arctic TernLaridae11992-90%1991
Black ScoterAnatidae11991n/an/a
Spotted SandpiperScolopacidae11991n/an/a
WhimbrelScolopacidae11991n/an/a
OspreyPandionidae11991n/an/a
Belted KingfisherAlcedinidae11991n/an/a
Savannah SparrowPasserellidae11992n/an/a

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