BirdAnalyst
BBS Route · Montana · BCR 10

St. Mary 2 Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 103 species recorded across 15 survey years, still active.

103Species 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 →
15Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
2009–2024Span
4Observers

Bird Species Found on Montana St. Mary 2

Top 40 of 103 species by most recent count. Each links to its species trend.

Species recorded on the St. Mary 2 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 SwallowHirundinidae732024+133%2011
Brewer's BlackbirdIcteridae632024+48%2011
Vesper SparrowPasserellidae602024+2%2011
Western MeadowlarkIcteridae482024+0%2011
Savannah SparrowPasserellidae282024-57%2011
American RobinTurdidae242024+32%2011
Black-billed MagpieCorvidae232024+97%2011
Red-winged BlackbirdIcteridae192024+53%2011
Tree SwallowHirundinidae192024+82%2011
Northern House WrenTroglodytidae182024-43%2011
Pine SiskinFringillidae162024+109%2012
Yellow WarblerParulidae162024+36%2011
White-crowned SparrowPasserellidae152024-2%2011
American CrowCorvidae142024+8%2011
European StarlingSturnidae122024+93%2011
Clay-colored SparrowPasserellidae122024+288%2011
Common RavenCorvidae102024+75%2012
Wilson's SnipeScolopacidae92024+0%2011
Ferruginous HawkAccipitridae92024+240%2014
Black-headed GrosbeakCardinalidae92024+80%2013
Barn SwallowHirundinidae82023+86%2011
Cedar WaxwingBombycillidae72022+100%2016
Northern WaterthrushParulidae62024+15%2011
Red-tailed HawkAccipitridae52024+15%2012
Canada GooseAnatidae52024+150%2017
Mourning DoveColumbidae52024+200%2017
Long-billed CurlewScolopacidae42023+100%2012
KilldeerCharadriidae42024-15%2012
VeeryTurdidae42024+138%2011
Swainson's HawkAccipitridae42023+50%2013
Western Wood-PeweeTyrannidae32024+60%2012
Brown-headed CowbirdIcteridae32024-60%2011
Warbling VireoVireonidae32023-33%2011
Mountain BluebirdTurdidae32018+0%2012
Least FlycatcherTyrannidae32024+60%2014
MallardAnatidae22024-60%2014
BuffleheadAnatidae22024+100%2013
Sandhill CraneGruidae22021+0%2011
SoraRallidae22023+67%2011
Upland SandpiperScolopacidae22024-82%2011

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