BirdAnalyst
BBS Route · Montana · BCR 11

Westby Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 85 species recorded across 8 survey years, still active.

85Species 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 →
8Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
2015–2025Span
2Observers

Bird Species Found on Montana Westby

Top 40 of 85 species by most recent count. Each links to its species trend.

Species recorded on the Westby 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
Red-winged BlackbirdIcteridae2082025+67%2017
Horned LarkAlaudidae1752025+35%2017
Western MeadowlarkIcteridae1412025+19%2017
Ring-necked PheasantPhasianidae1262025-4%2017
Eared GrebePodicipedidae1212023+100%2016
Mourning DoveColumbidae1172025+33%2017
Vesper SparrowPasserellidae1032025+109%2017
Northern ShovelerAnatidae602024+412%2017
Brown-headed CowbirdIcteridae512025-34%2017
Yellow-headed BlackbirdIcteridae432025+109%2017
Savannah SparrowPasserellidae412025-20%2017
Lark BuntingPasserellidae392016n/an/a
Common GrackleIcteridae362025+31%2017
Blue-winged TealAnatidae302025+47%2017
Eastern KingbirdTyrannidae242025+15%2017
Chestnut-collared LongspurCalcariidae232025+262%2021
Clay-colored SparrowPasserellidae222025-21%2017
Northern PintailAnatidae212024-27%2019
Baird's SparrowPasserellidae212025+65%2017
Western KingbirdTyrannidae202025+10%2017
BobolinkIcteridae202025-20%2017
KilldeerCharadriidae192025-66%2017
Grasshopper SparrowPasserellidae172025-20%2017
Upland SandpiperScolopacidae152025+44%2017
WilletScolopacidae132025+71%2017
Marbled GodwitScolopacidae122025-59%2017
Marsh WrenTroglodytidae122025+75%2017
American RobinTurdidae122025+43%2017
CanvasbackAnatidae122021n/an/a
House SparrowPasseridae112025-19%2017
Wilson's SnipeScolopacidae102025+77%2019
Common YellowthroatParulidae102025-21%2017
Lesser ScaupAnatidae92024+8%2017
American GoldfinchFringillidae92023-12%2017
MallardAnatidae82025-31%2017
Ruddy DuckAnatidae72025+700%2016
Barn SwallowHirundinidae72025-39%2017
SoraRallidae62025+650%2016
Sedge WrenTroglodytidae62023n/an/a
GadwallAnatidae52025-3%2017

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