BirdAnalyst
BBS Route · Montana · BCR 17

Roy Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 108 species recorded across 24 survey years, still active.

108Species 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 →
24Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1988–2025Span
8Observers

Bird Species Found on Montana Roy

Top 40 of 108 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
Lark BuntingPasserellidae2312025-58%1991
Western MeadowlarkIcteridae1862025+53%1991
Rock PigeonColumbidae692025+525%1993
Brown-headed CowbirdIcteridae392025-45%1991
Long-billed CurlewScolopacidae292025+488%1993
European StarlingSturnidae262025+89%1991
Red-winged BlackbirdIcteridae242025-36%1991
Grasshopper SparrowPasserellidae242025+267%1992
Brewer's BlackbirdIcteridae232025-54%1993
Vesper SparrowPasserellidae212025-69%1991
Mourning DoveColumbidae192025+60%1991
Barn SwallowHirundinidae162025-16%1991
Greater Sage-GrousePhasianidae122021+33%1997
Ring-necked PheasantPhasianidae112025+5%1991
Lesser ScaupAnatidae112025+70%1995
KilldeerCharadriidae82025-31%1991
Wilson's PhalaropeScolopacidae72025+143%1993
Canada GooseAnatidae62019+500%1996
MallardAnatidae52024-81%1991
Horned LarkAlaudidae52025-91%1991
American WigeonAnatidae52025-52%1994
Sharp-tailed GrousePhasianidae42024+50%1992
Eastern KingbirdTyrannidae42025-8%1992
Wilson's SnipeScolopacidae42025+225%1994
Mountain BluebirdTurdidae41989n/an/a
Ring-billed GullLaridae42013+258%1994
Field SparrowPasserellidae41991n/an/a
Northern Rough-winged SwallowHirundinidae41993n/an/a
Spotted SandpiperScolopacidae41999+300%1996
Ruddy DuckAnatidae42019+100%2007
Ring-necked DuckAnatidae42023n/an/a
GadwallAnatidae32025-78%1993
American RobinTurdidae32025-33%1991
Common GrackleIcteridae32025-92%1995
Short-eared OwlStrigidae32024+233%1999
Eurasian Collared-DoveColumbidae32024+50%2019
Upland SandpiperScolopacidae22025+39%1991
Gray PartridgePhasianidae22024-67%1989
Northern HarrierAccipitridae22025-20%1992
Swainson's HawkAccipitridae22023+75%1993

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