BirdAnalyst
BBS Route · Montana · BCR 17

Forsyth Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 121 species recorded across 31 survey years, still active.

121Species 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 →
31Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1980–2023Span
4Observers

Bird Species Found on Montana Forsyth

Top 40 of 121 species by most recent count. Each links to its species trend.

Species recorded on the Forsyth 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 MeadowlarkIcteridae2112023-23%1989
Red-winged BlackbirdIcteridae882023-1%1989
Cliff SwallowHirundinidae732023+90%1989
Mourning DoveColumbidae642023-45%1989
Ring-necked PheasantPhasianidae542023+61%1989
European StarlingSturnidae382023-4%1989
Eastern KingbirdTyrannidae302023+79%1989
Yellow WarblerParulidae272023+193%1989
Western KingbirdTyrannidae252023+159%1989
Grasshopper SparrowPasserellidae252023+660%1989
Lark SparrowPasserellidae252023-17%1989
American White PelicanPelecanidae212006+133%2004
Brown-headed CowbirdIcteridae182023+110%1990
Northern House WrenTroglodytidae152023+59%1989
Field SparrowPasserellidae132023+188%1989
American RobinTurdidae132023+68%1989
Canada GooseAnatidae132022-45%1994
Western Wood-PeweeTyrannidae92023+71%1990
Vesper SparrowPasserellidae82023+9%1990
Barn SwallowHirundinidae82023+14%1989
Yellow-breasted ChatIcteriidae82023+55%1989
Say's PhoebeTyrannidae82023+180%1992
Orchard OrioleIcteridae82023+325%2003
BobolinkIcteridae72023+425%1995
Wilson's SnipeScolopacidae62018+71%1990
Common NighthawkCaprimulgidae62023-27%1989
Bullock's OrioleIcteridae62023+300%1989
Upland SandpiperScolopacidae62023+133%1990
Warbling VireoVireonidae62023+160%1992
Brewer's SparrowPasserellidae62023+229%2007
Lazuli BuntingCardinalidae62023+267%1996
Horned LarkAlaudidae52023-58%1989
Least FlycatcherTyrannidae52023+175%1999
MallardAnatidae42023-55%1989
KilldeerCharadriidae42023-70%1989
Common GrackleIcteridae42023-85%1989
SoraRallidae42018+300%1989
Gray CatbirdMimidae42021+50%1994
Bank SwallowHirundinidae42023+300%2015
Northern ShovelerAnatidae32022+80%2005

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