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BBS Route · Alaska · BCR 4

Porcupine R. Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 57 species recorded across 10 survey years, no longer active.

57Species 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 →
10Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1993–2002Span
2Observers

Bird Species Found on Alaska Porcupine R.

Top 40 of 57 species by most recent count. Each links to its species trend.

Species recorded on the Porcupine R. 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 ThrushTurdidae282002-43%1995
Alder FlycatcherTyrannidae242002-26%1995
American RobinTurdidae202002-17%1995
American WigeonAnatidae112002+52%1995
White-crowned SparrowPasserellidae112002-70%1995
Orange-crowned WarblerParulidae112002+88%1995
MallardAnatidae102001+211%1998
BuffleheadAnatidae102002-39%1996
American Tree SparrowPasserellidae101994n/an/a
Yellow WarblerParulidae92002+43%1995
Bank SwallowHirundinidae82002-34%1995
Fox SparrowPasserellidae62001-20%1996
Varied ThrushTurdidae62002+0%1995
Herring GullLaridae52002+38%1997
Arctic TernLaridae52002-52%1995
Solitary SandpiperScolopacidae52002-40%1995
Wilson's SnipeScolopacidae42002+6%1995
Spotted SandpiperScolopacidae42002-60%1995
Northern WaterthrushParulidae42001+91%1995
Sandhill CraneGruidae42000+50%1997
Short-billed GullLaridae32002-69%1995
Lesser YellowlegsScolopacidae32002+50%1995
Canada GooseAnatidae32001+0%1995
Common GoldeneyeAnatidae21993n/an/a
Olive-sided FlycatcherTyrannidae22002-14%1995
Bohemian WaxwingBombycillidae22002+0%1995
Northern PintailAnatidae22001+300%1998
Pacific LoonGaviidae22002+100%1997
Red-tailed HawkAccipitridae22002+100%1998
Red-breasted MerganserAnatidae22000+0%1999
Downy WoodpeckerPicidae22000n/an/a
Common LoonGaviidae22002n/an/a
Northern ShovelerAnatidae12002-33%1996
Semipalmated PloverCharadriidae12002-33%1995
Common RavenCorvidae12002-31%1995
White-winged CrossbillFringillidae12002+127%1997
Savannah SparrowPasserellidae12002+83%1995
Red-necked GrebePodicipedidae11999+0%1994
Lesser ScaupAnatidae12002+189%1996
Canada JayCorvidae12002-36%1996

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