BirdAnalyst
BBS Route · Montana · BCR 10

St Mary Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 146 species recorded across 34 survey years, no longer active.

146Species 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 →
1968–2008Span
11Observers

Bird Species Found on Montana St Mary

Top 40 of 146 species by most recent count. Each links to its species trend.

Species recorded on the St Mary 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 SwallowHirundinidae2162008+310%1970
Brewer's BlackbirdIcteridae1002008+1%1970
Western MeadowlarkIcteridae962008-9%1970
Vesper SparrowPasserellidae572008+13%1974
Savannah SparrowPasserellidae44200820×1970
Brown-headed CowbirdIcteridae252008+233%1974
Red CrossbillFringillidae251997n/an/a
American RobinTurdidae242008+28%1970
American CrowCorvidae202008-11%1970
Black-billed MagpieCorvidae182008+72%1970
Northern House WrenTroglodytidae152008+60%1974
Wilson's SnipeScolopacidae142008+225%1972
Northern Rough-winged SwallowHirundinidae121982n/an/a
Red-winged BlackbirdIcteridae102008-6%1970
Horned LarkAlaudidae102008+243%1972
White-crowned SparrowPasserellidae102008+17%1973
Common GrackleIcteridae91971n/an/a
Yellow WarblerParulidae82008+550%1971
KilldeerCharadriidae72008-36%1970
Red-tailed HawkAccipitridae52008-18%1977
California GullLaridae41991-81%1970
Common TernLaridae41968n/an/a
Tree SwallowHirundinidae42008+3%1970
MallardAnatidae42008-33%1971
Pine SiskinFringillidae42008-56%1976
Warbling VireoVireonidae42008+233%1974
Lesser ScaupAnatidae41997+100%1990
Upland SandpiperScolopacidae32008+130%1976
Purple MartinHirundinidae31968n/an/a
Bank SwallowHirundinidae32002-96%1974
Mountain BluebirdTurdidae32008+50%1974
VeeryTurdidae32008-84%1972
Barrow's GoldeneyeAnatidae31994-43%1979
European StarlingSturnidae32008+450%1977
SoraRallidae32008+25%1985
American RedstartParulidae32002+150%1979
Ruby-crowned KingletRegulidae32008-29%1981
Black TernLaridae32002n/an/a
Northern PintailAnatidae21994-29%1979
Long-billed CurlewScolopacidae22005-40%1970

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