BirdAnalyst
BBS Route · Montana · BCR 17

Leroy Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 93 species recorded across 41 survey years, still active.

93Species 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 →
1970–2024Span
6Observers

Bird Species Found on Montana Leroy

Top 40 of 93 species by most recent count. Each links to its species trend.

Species recorded on the Leroy 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 MeadowlarkIcteridae1602024+105%1972
Vesper SparrowPasserellidae562024-28%1972
Rock PigeonColumbidae422018+123%2005
Mourning DoveColumbidae202024-36%1972
Red-winged BlackbirdIcteridae192024+171%1972
American RobinTurdidae182019+400%1972
European StarlingSturnidae172024+0%1984
Horned LarkAlaudidae152024-16%1972
Brewer's BlackbirdIcteridae152024-16%1972
Long-billed CurlewScolopacidae132024+283%1999
Common RavenCorvidae102024+130%2007
KilldeerCharadriidae92024+27%1972
American CrowCorvidae92024+380%2000
Common NighthawkCaprimulgidae52018-43%1981
Brewer's SparrowPasserellidae52024-40%1972
Mountain BluebirdTurdidae52024+54%1981
American KestrelFalconidae42024+18%1980
Yellow-headed BlackbirdIcteridae42019-10%1989
Lark BuntingPasserellidae42024-88%1988
Ring-necked PheasantPhasianidae32004+0%1980
GadwallAnatidae32018+14%1984
Green-tailed TowheePasserellidae32019-38%1994
Common GrackleIcteridae32024-40%1984
Short-eared OwlStrigidae31994+50%1990
Red CrossbillFringillidae32019+14%1995
Lesser ScaupAnatidae32017+50%1994
Cinnamon TealAnatidae32019+125%2015
MallardAnatidae22019+167%1972
Barn SwallowHirundinidae22024-39%1980
Blue-winged TealAnatidae22019-25%1981
Wilson's PhalaropeScolopacidae22019+125%1984
Brown-headed CowbirdIcteridae22024-88%1984
Lark SparrowPasserellidae22024-67%1984
Green-winged TealAnatidae22014+75%1994
Say's PhoebeTyrannidae22024-64%1992
Spotted TowheePasserellidae22024+120%1996
Hairy WoodpeckerPicidae21993n/an/a
RedheadAnatidae22017-33%1996
Sage ThrasherMimidae22024+0%2011
CanvasbackAnatidae22014n/an/a

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