BirdAnalyst
BBS Route · Alaska · BCR 5

Sheep Mtn Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 92 species recorded across 18 survey years, still active.

92Species 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 →
18Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1983–2017Span
3Observers

Bird Species Found on Alaska Sheep Mtn

Top 40 of 92 species by most recent count. Each links to its species trend.

Species recorded on the Sheep Mtn 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
White-crowned SparrowPasserellidae732017-35%1985
Wilson's WarblerParulidae442017-20%1985
Hermit ThrushTurdidae372017-2%1985
Orange-crowned WarblerParulidae282017-42%1985
Blackpoll WarblerParulidae262017-24%1985
Swainson's ThrushTurdidae262017+166%1985
Fox SparrowPasserellidae222017+39%1985
Cliff SwallowHirundinidae202004+75%1994
Alder FlycatcherTyrannidae182017+52%1985
American RobinTurdidae162017-46%1985
Canada JayCorvidae142017+9%1985
Greater ScaupAnatidae112014+12%1985
Black-capped ChickadeeParidae112017+300%1985
Northern ShovelerAnatidae102004+500%1996
Savannah SparrowPasserellidae92017-4%1985
Lesser ScaupAnatidae82008n/an/a
Varied ThrushTurdidae62017+225%1993
American WigeonAnatidae52011+156%1985
Violet-green SwallowHirundinidae52014-25%1994
Black-billed MagpieCorvidae42017-17%1985
Yellow WarblerParulidae42017+11%1985
Arctic WarblerPhylloscopidae42017+10%1985
Ruby-crowned KingletRegulidae42017-74%1985
Green-winged TealAnatidae42006+80%1999
Townsend's SolitaireTurdidae42014+120%1994
Trumpeter SwanAnatidae32017+60%1985
Gray-cheeked ThrushTurdidae32017-89%1985
Bank SwallowHirundinidae32007-17%1999
Common LoonGaviidae22011-20%1993
BuffleheadAnatidae21984+100%1983
Common RavenCorvidae22017+0%1993
American Tree SparrowPasserellidae22017-62%1985
Bonaparte's GullLaridae22017-43%1994
Long-billed DowitcherScolopacidae21984n/an/a
MerlinFalconidae22011+75%1994
Golden EagleAccipitridae21994+100%1985
MallardAnatidae22011-33%2000
Barrow's GoldeneyeAnatidae22014+0%2000
American KestrelFalconidae22006+100%1999
Short-eared OwlStrigidae21999n/an/a

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