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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 35 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 →
35Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1973–2025Span
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 SwallowHirundinidae1802025-45%1975
Canada GooseAnatidae1332025+716%1986
European StarlingSturnidae1022025+88%1975
Savannah SparrowPasserellidae892025+176%1980
Vesper SparrowPasserellidae752025+290%1978
Brewer's SparrowPasserellidae672025+19%1975
American AvocetRecurvirostridae422012+194%1994
Red-winged BlackbirdIcteridae382025+89%1975
Western MeadowlarkIcteridae382025+15%1975
White-crowned SparrowPasserellidae302025+352%1975
Lincoln's SparrowPasserellidae232025+339%1991
Black-billed MagpieCorvidae222025+425%1975
Common RavenCorvidae172025+600%1986
Ring-necked DuckAnatidae161996+300%1992
Sandhill CraneGruidae152025-55%1975
Yellow WarblerParulidae152025+132%1975
Brewer's BlackbirdIcteridae132025-67%1975
American RobinTurdidae122025+17%1975
Mountain BluebirdTurdidae112025+200%1975
American White PelicanPelecanidae112024+20%1997
Barn SwallowHirundinidae102025+113%1978
Horned LarkAlaudidae92025-68%1975
Common MerganserAnatidae81997+400%1993
Red-tailed HawkAccipitridae72025+38%1975
California GullLaridae62005-73%1978
Wilson's PhalaropeScolopacidae62017+6%1975
Song SparrowPasserellidae62025+275%1975
Green-tailed TowheePasserellidae62025+300%1994
Long-billed CurlewScolopacidae52025+139%1975
American CrowCorvidae52024-81%1975
Ring-billed GullLaridae52019-97%1992
Warbling VireoVireonidae52025+113%1986
Greater Sage-GrousePhasianidae51988n/an/a
MallardAnatidae42025-11%1975
Northern ShovelerAnatidae42019+200%1980
Northern PintailAnatidae42017+60%1978
Wilson's SnipeScolopacidae42025+2%1975
GadwallAnatidae42023+43%1991
Trumpeter SwanAnatidae42023-82%1980
Evening GrosbeakFringillidae42025+100%1990

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