BirdAnalyst
BBS Route · Montana · BCR 10

St. Mary 2 Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 106 species recorded across 16 survey years, still active.

106Species 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 →
16Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
2009–2025Span
4Observers

Bird Species Found on Montana St. Mary 2

Top 40 of 106 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
Vesper SparrowPasserellidae542025+28%2011
Brewer's BlackbirdIcteridae482025+30%2011
Western MeadowlarkIcteridae452025-3%2011
Cliff SwallowHirundinidae272025+126%2011
Black-billed MagpieCorvidae222025+127%2011
Red-winged BlackbirdIcteridae202025+90%2011
American RobinTurdidae172025+32%2011
Yellow WarblerParulidae142025+30%2011
Savannah SparrowPasserellidae132025-50%2011
White-crowned SparrowPasserellidae132025-13%2011
Tree SwallowHirundinidae122025+96%2011
Clay-colored SparrowPasserellidae112025+325%2011
American CrowCorvidae82025+13%2011
European StarlingSturnidae82025+113%2011
Barn SwallowHirundinidae82023+86%2011
Northern House WrenTroglodytidae72025-46%2011
Ferruginous HawkAccipitridae62025+280%2014
Gray CatbirdMimidae62025-23%2011
Common RavenCorvidae62025+125%2012
Western Wood-PeweeTyrannidae52025+120%2012
Wilson's SnipeScolopacidae42025-8%2011
Eastern KingbirdTyrannidae42025+29%2012
VeeryTurdidae42025+75%2011
Brown-headed CowbirdIcteridae32025-76%2011
Pine SiskinFringillidae32025+127%2012
Chipping SparrowPasserellidae32025-33%2011
Northern WaterthrushParulidae32025-25%2011
Swainson's ThrushTurdidae32025+250%2011
Mountain BluebirdTurdidae32018+0%2012
MallardAnatidae22024-60%2014
BuffleheadAnatidae22024+100%2013
Sandhill CraneGruidae22021+0%2011
SoraRallidae22023+67%2011
Upland SandpiperScolopacidae22025-77%2011
Long-billed CurlewScolopacidae22025+100%2012
KilldeerCharadriidae22025-39%2012
American GoldfinchFringillidae22025+0%2014
Lincoln's SparrowPasserellidae22025+50%2014
Cedar WaxwingBombycillidae22025+67%2017
Warbling VireoVireonidae22025-33%2011

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