BirdAnalyst
BBS Route · Montana · BCR 17

Two Dot Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 134 species recorded across 41 survey years, still active.

134Species 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 →
41Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1976–2024Span
4Observers

Bird Species Found on Montana Two Dot

Top 40 of 134 species by most recent count. Each links to its species trend.

Species recorded on the Two Dot 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
Western MeadowlarkIcteridae1832024+144%1978
European StarlingSturnidae1002024+87%1978
Red-winged BlackbirdIcteridae912024+439%1978
American White PelicanPelecanidae722024+830%1988
Savannah SparrowPasserellidae682024+138%1978
Vesper SparrowPasserellidae552024-33%1978
Double-crested CormorantPhalacrocoracidae50202413×1994
Canada GooseAnatidae492024+568%1988
BobolinkIcteridae35202426×1978
Ring-billed GullLaridae322024+52%1978
American RobinTurdidae282024+10%1978
Sandhill CraneGruidae252024+840%1987
Red CrossbillFringillidae25200113×1985
Tree SwallowHirundinidae212024+200%1978
Wilson's SnipeScolopacidae192024+30%1978
Eared GrebePodicipedidae192024-15%1996
Brewer's BlackbirdIcteridae182024-68%1978
RedheadAnatidae182024+805%2000
Baird's SparrowPasserellidae142024+733%1993
Long-billed CurlewScolopacidae132024+415%1978
Upland SandpiperScolopacidae122024-61%1978
KilldeerCharadriidae122024+36%1978
Common RavenCorvidae112024+575%1981
Cliff SwallowHirundinidae112024-30%1980
Black-billed MagpieCorvidae102024-17%1978
Brewer's SparrowPasserellidae102009+0%1988
Northern House WrenTroglodytidae102024+92%1978
Mourning DoveColumbidae92024-44%1978
Northern HarrierAccipitridae92024+267%1978
Yellow WarblerParulidae92024+73%1978
Horned LarkAlaudidae82024-69%1978
Grasshopper SparrowPasserellidae82024+325%1981
American KestrelFalconidae72024+67%1978
American GoldfinchFringillidae72024+71%1980
Western Wood-PeweeTyrannidae62024+23%1978
American CrowCorvidae62018+29%1979
American CootRallidae62024-85%2000
American WigeonAnatidae62024+6%1988
Lesser ScaupAnatidae62017+100%1991
Ring-necked DuckAnatidae62021-84%2001

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