BirdAnalyst
BBS Route · Montana · BCR 17

Roy Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 107 species recorded across 23 survey years, still active.

107Species 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 →
23Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1988–2024Span
8Observers

Bird Species Found on Montana Roy

Top 40 of 107 species by most recent count. Each links to its species trend.

Species recorded on the Roy 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 MeadowlarkIcteridae2102024+60%1991
Rock PigeonColumbidae612024+371%1993
Brown-headed CowbirdIcteridae542024-51%1991
Vesper SparrowPasserellidae542024-70%1991
Lark BuntingPasserellidae422024-81%1991
Red-winged BlackbirdIcteridae212024-46%1991
Grasshopper SparrowPasserellidae172024+240%1992
Ring-necked PheasantPhasianidae132024+8%1991
Greater Sage-GrousePhasianidae122021+33%1997
Mourning DoveColumbidae122024+30%1991
Brewer's BlackbirdIcteridae102024-42%1993
Long-billed CurlewScolopacidae102024+288%1993
Barn SwallowHirundinidae82024-16%1991
KilldeerCharadriidae72024-52%1991
Wilson's PhalaropeScolopacidae72024+86%1993
Upland SandpiperScolopacidae62024+77%1991
Canada GooseAnatidae62019+500%1996
MallardAnatidae52024-81%1991
Sharp-tailed GrousePhasianidae42024+50%1992
Horned LarkAlaudidae42024-93%1991
Clay-colored SparrowPasserellidae42024-77%1991
Mountain BluebirdTurdidae41989n/an/a
Ring-billed GullLaridae42013+258%1994
American WigeonAnatidae42023-44%1994
Field SparrowPasserellidae41991n/an/a
Northern Rough-winged SwallowHirundinidae41993n/an/a
Spotted SandpiperScolopacidae41999+300%1996
Ruddy DuckAnatidae42019+100%2007
Ring-necked DuckAnatidae42023n/an/a
Brewer's SparrowPasserellidae32024+35%1995
Short-eared OwlStrigidae32024+233%1999
Eurasian Collared-DoveColumbidae32024+50%2019
GadwallAnatidae22024-74%1993
Gray PartridgePhasianidae22024-67%1989
Northern HarrierAccipitridae22024-30%1992
Swainson's HawkAccipitridae22023+75%1993
Black-billed MagpieCorvidae22023+0%2010
Spotted TowheePasserellidae21988n/an/a
House SparrowPasseridae22012-77%1995
Sage ThrasherMimidae22017+100%1988

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