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BBS Route · Alaska · BCR 5

Sheep Mtn Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 94 species recorded across 19 survey years, still active.

94Species 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 →
19Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1983–2025Span
4Observers

Bird Species Found on Alaska Sheep Mtn

Top 40 of 94 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 SparrowPasserellidae982025-21%1985
Swainson's ThrushTurdidae612025+252%1985
American RobinTurdidae512025-48%1985
Wilson's WarblerParulidae492025-24%1985
Alder FlycatcherTyrannidae482025+177%1985
Orange-crowned WarblerParulidae282025-44%1985
Fox SparrowPasserellidae272025+22%1985
Hermit ThrushTurdidae262025-9%1985
Cliff SwallowHirundinidae202004+75%1994
Surf ScoterAnatidae132025n/an/a
Ruby-crowned KingletRegulidae122025-72%1985
Greater ScaupAnatidae112014+12%1985
Lincoln's SparrowPasserellidae102025+71%1985
Blackpoll WarblerParulidae102025-33%1985
Northern ShovelerAnatidae102004+500%1996
Canada JayCorvidae92025-12%1985
Olive-sided FlycatcherTyrannidae82025-39%1985
Common RavenCorvidae72025+11%1993
Savannah SparrowPasserellidae72025-32%1985
American WigeonAnatidae52011+156%1985
Black-capped ChickadeeParidae52025+375%1985
Arctic WarblerPhylloscopidae42025+10%1985
Green-winged TealAnatidae42006+80%1999
Black-billed MagpieCorvidae32025-53%1985
Violet-green SwallowHirundinidae32025-31%1994
Yellow WarblerParulidae32025+33%1985
Varied ThrushTurdidae32025+188%1993
Bank SwallowHirundinidae32007-17%1999
Red-tailed HawkAccipitridae32025+100%1999
Lesser ScaupAnatidae32025-63%2008
Common LoonGaviidae22011-20%1993
BuffleheadAnatidae21984+100%1983
Trumpeter SwanAnatidae22025+40%1985
American Tree SparrowPasserellidae22017-62%1985
Bonaparte's GullLaridae22017-43%1994
Long-billed DowitcherScolopacidae21984n/an/a
Golden EagleAccipitridae21994+100%1985
Townsend's SolitaireTurdidae22025+100%1994
Boreal ChickadeeParidae22025+0%2000
MallardAnatidae22011-33%2000

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