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BBS Route · Montana · BCR 10

Beaverhead Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 118 species recorded across 34 survey years, still active.

118Species 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 →
34Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1973–2024Span
10Observers

Bird Species Found on Montana Beaverhead

Top 40 of 118 species by most recent count. Each links to its species trend.

Species recorded on the Beaverhead 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
Cliff SwallowHirundinidae1422024-57%1975
Savannah SparrowPasserellidae1252024+90%1980
Vesper SparrowPasserellidae1012024+208%1978
Brewer's SparrowPasserellidae842024-10%1975
Western MeadowlarkIcteridae692024+1%1975
European StarlingSturnidae442024-36%1975
American AvocetRecurvirostridae422012+194%1994
White-crowned SparrowPasserellidae332024+310%1975
Wilson's SnipeScolopacidae232024+25%1975
Tree SwallowHirundinidae212024+67%1975
Yellow WarblerParulidae212024+68%1975
Lincoln's SparrowPasserellidae192024+169%1991
Long-billed CurlewScolopacidae182024+185%1975
American RobinTurdidae182024-6%1975
Red-winged BlackbirdIcteridae162024+28%1975
Ring-necked DuckAnatidae161996+300%1992
Sandhill CraneGruidae122024-53%1975
Horned LarkAlaudidae112024-77%1975
Common RavenCorvidae112024+360%1986
American White PelicanPelecanidae112024+20%1997
Black-billed MagpieCorvidae102024+225%1975
Brewer's BlackbirdIcteridae102024-76%1975
WilletScolopacidae82024-35%1975
Brown-headed CowbirdIcteridae82024-66%1975
Sage ThrasherMimidae82024-48%1975
Common MerganserAnatidae81997+400%1993
Song SparrowPasserellidae72024+150%1975
Mountain BluebirdTurdidae72024+125%1975
Warbling VireoVireonidae72024+88%1986
Common YellowthroatParulidae72024+125%1991
California GullLaridae62005-73%1978
Wilson's PhalaropeScolopacidae62017+6%1975
Yellow-headed BlackbirdIcteridae62024+63%1978
Willow FlycatcherTyrannidae52024-11%1975
American CrowCorvidae52024-81%1975
Ring-billed GullLaridae52019-97%1992
Greater Sage-GrousePhasianidae51988n/an/a
Green-tailed TowheePasserellidae52024+133%1994
Northern ShovelerAnatidae42019+200%1980
Northern PintailAnatidae42017+60%1978

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