BirdAnalyst
BBS Route · Montana · BCR 17

Flatwillow Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 111 species recorded across 34 survey years, no longer active.

111Species 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 →
34Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1968–2008Span
2Observers

Bird Species Found on Montana Flatwillow

Top 40 of 111 species by most recent count. Each links to its species trend.

Species recorded on the Flatwillow 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 MeadowlarkIcteridae2102008-54%1971
Lark BuntingPasserellidae722008-24%1971
Brown-headed CowbirdIcteridae472008+313%1971
Ring-necked PheasantPhasianidae392008-79%1971
Vesper SparrowPasserellidae362008+14%1971
European StarlingSturnidae352008+160%1971
Mourning DoveColumbidae302008+22%1971
Red-winged BlackbirdIcteridae212008+87%1971
Eastern KingbirdTyrannidae152008+94%1971
American RobinTurdidae152008+82%1974
Brewer's BlackbirdIcteridae142008-17%1971
Long-billed CurlewScolopacidae102008-13%1971
Yellow WarblerParulidae102008+35%1971
Common YellowthroatParulidae92008+160%1971
Chestnut-collared LongspurCalcariidae82006+64%1974
American AvocetRecurvirostridae72003n/an/a
Horned LarkAlaudidae62008+4%1971
Barn SwallowHirundinidae62008+50%1971
American GoldfinchFringillidae62008+56%1974
Wilson's SnipeScolopacidae62008+200%1986
Grasshopper SparrowPasserellidae52008+15%1971
House SparrowPasseridae51987+13%1974
Gray CatbirdMimidae52008+20%1972
Mountain PloverCharadriidae51995n/an/a
Northern House WrenTroglodytidae42008+38%1971
American CrowCorvidae42008+100%1975
Tree SwallowHirundinidae41992+300%1972
California GullLaridae41999+625%1985
Ring-billed GullLaridae42007-11%1989
Marbled GodwitScolopacidae42003+33%1976
Common MerganserAnatidae41977n/an/a
American CootRallidae41991+300%1982
Swainson's HawkAccipitridae32006+50%1986
Black-billed MagpieCorvidae32008-28%1971
Lark SparrowPasserellidae32008+325%1974
Cliff SwallowHirundinidae32008-43%1971
American WigeonAnatidae31991+0%1976
Belted KingfisherAlcedinidae31975+200%1974
Song SparrowPasserellidae32008+50%1984
Northern PintailAnatidae32003-30%1983

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