BirdAnalyst
BBS Route · Montana · BCR 10

Chestnut Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 118 species recorded across 54 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 →
54Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1968–2025Span
5Observers

Bird Species Found on Montana Chestnut

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

Species recorded on the Chestnut 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
American RobinTurdidae762025-38%1970
Black-billed MagpieCorvidae692025+117%1970
Savannah SparrowPasserellidae46202522×1970
Yellow WarblerParulidae462025+87%1970
Lincoln's SparrowPasserellidae392025+944%1971
Warbling VireoVireonidae382025+81%1970
Willow FlycatcherTyrannidae36202512×1980
Tree SwallowHirundinidae352025+80%1970
European StarlingSturnidae322025-14%1970
Red-winged BlackbirdIcteridae272025+161%1970
White-crowned SparrowPasserellidae252025-3%1970
VeeryTurdidae252025+10%1970
Pine SiskinFringillidae242025-20%1970
Red CrossbillFringillidae222017+225%1978
American CrowCorvidae192025+22%1970
Common YellowthroatParulidae192025+617%1972
Song SparrowPasserellidae152025+0%1970
Northern House WrenTroglodytidae142025+3%1970
Canada GooseAnatidae142025-29%2008
Mountain BluebirdTurdidae122025+33%1970
Western TanagerCardinalidae112025-12%1970
Barn SwallowHirundinidae102018-28%1970
Ruby-crowned KingletRegulidae102025+22%1970
Common RavenCorvidae102025+118%1977
Bank SwallowHirundinidae82022n/an/a
Mountain ChickadeeParidae72025-36%1971
Brewer's BlackbirdIcteridae62025-83%1970
Chipping SparrowPasserellidae62025+11%1970
Wilson's SnipeScolopacidae52025-77%1970
Brewer's SparrowPasserellidae52025+23%1970
Western Wood-PeweeTyrannidae42025+63%1972
Brown-headed CowbirdIcteridae42025-64%1970
Evening GrosbeakFringillidae42022+117%1972
Rock PigeonColumbidae42025+300%1992
Ruffed GrousePhasianidae32022+25%1976
Dusky FlycatcherTyrannidae32025+22%1972
Clark's NutcrackerCorvidae32019+60%1978
Cassin's FinchFringillidae32024-11%1970
Black-capped ChickadeeParidae32025+36%1971
Swainson's ThrushTurdidae32025+0%1973

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