BirdAnalyst
BBS Route · Montana · BCR 17

Two Dot Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 134 species recorded across 42 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 →
42Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1976–2025Span
5Observers

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 MeadowlarkIcteridae1272025+103%1978
Red-winged BlackbirdIcteridae682025+439%1978
Canada GooseAnatidae592025+524%1988
European StarlingSturnidae552025+88%1978
Vesper SparrowPasserellidae392025-37%1978
Savannah SparrowPasserellidae312025+113%1978
American White PelicanPelecanidae282025+695%1988
Red CrossbillFringillidae25200113×1985
Eared GrebePodicipedidae192024-15%1996
RedheadAnatidae182024+805%2000
Wilson's SnipeScolopacidae172025+38%1978
Double-crested CormorantPhalacrocoracidae152025+600%1994
Brewer's BlackbirdIcteridae142025-73%1978
Long-billed CurlewScolopacidae132025+354%1978
American RobinTurdidae132025-2%1978
BobolinkIcteridae11202520×1978
Sandhill CraneGruidae112025+860%1987
Brewer's SparrowPasserellidae102009+0%1988
KilldeerCharadriidae72025+16%1978
American WigeonAnatidae72025-11%1988
GadwallAnatidae72025+71%1991
Black-billed MagpieCorvidae62025+6%1978
Brown-headed CowbirdIcteridae62025-33%1978
Barn SwallowHirundinidae62025-48%1978
American CootRallidae62024-85%2000
MallardAnatidae62025+36%1985
Ring-necked DuckAnatidae62021-84%2001
Yellow WarblerParulidae52025+33%1978
Clark's NutcrackerCorvidae52024+50%1991
Pinyon JayCorvidae51996+400%1980
Cedar WaxwingBombycillidae52014n/an/a
Short-eared OwlStrigidae52024-29%2015
Upland SandpiperScolopacidae42025-69%1978
Common NighthawkCaprimulgidae42024-60%1979
Horned LarkAlaudidae42025-69%1978
Common YellowthroatParulidae42025+0%1978
Sprague's PipitMotacillidae42025+200%1980
Northern ShovelerAnatidae42024+100%1979
Mourning DoveColumbidae32025-44%1978
Western Wood-PeweeTyrannidae32025+8%1978

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