BirdAnalyst
BBS Route · Montana · BCR 17

Leroy Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 95 species recorded across 42 survey years, still active.

95Species 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 →
1970–2025Span
7Observers

Bird Species Found on Montana Leroy

Top 40 of 95 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 MeadowlarkIcteridae1902025+106%1972
Vesper SparrowPasserellidae1572025+24%1972
Brewer's BlackbirdIcteridae522025+9%1972
Mourning DoveColumbidae292025-53%1972
Horned LarkAlaudidae242025+48%1972
Red-winged BlackbirdIcteridae222025+241%1972
Brewer's SparrowPasserellidae172025-23%1972
European StarlingSturnidae172024+0%1984
Lark BuntingPasserellidae132025-78%1988
Cliff SwallowHirundinidae82025+125%2017
Common RavenCorvidae82025+150%2007
Field SparrowPasserellidae82025+700%2024
Mountain BluebirdTurdidae52024+54%1981
Upland SandpiperScolopacidae52025+63%1984
Gray PartridgePhasianidae52025+125%1991
Barn SwallowHirundinidae42025-39%1980
Yellow-headed BlackbirdIcteridae42019-10%1989
Grasshopper SparrowPasserellidae42025+0%2005
Ring-necked PheasantPhasianidae32004+0%1980
Chipping SparrowPasserellidae32025-44%1991
GadwallAnatidae32018+14%1984
Lark SparrowPasserellidae32025-50%1984
Common GrackleIcteridae32024-40%1984
Short-eared OwlStrigidae31994+50%1990
Lesser ScaupAnatidae32017+50%1994
Cinnamon TealAnatidae32019+125%2015
Sage ThrasherMimidae32025+50%2011
KilldeerCharadriidae22025-5%1972
Blue-winged TealAnatidae22019-25%1981
Wilson's PhalaropeScolopacidae22019+125%1984
Brown-headed CowbirdIcteridae22024-88%1984
Green-winged TealAnatidae22014+75%1994
Rock PigeonColumbidae22025+109%2005
Say's PhoebeTyrannidae22024-64%1992
Long-billed CurlewScolopacidae22025+267%1999
Spotted TowheePasserellidae22025+80%1996
Hairy WoodpeckerPicidae21993n/an/a
RedheadAnatidae22017-33%1996
CanvasbackAnatidae22014n/an/a
Franklin's GullLaridae22024n/an/a

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