BirdAnalyst
BBS Route · Montana · BCR 11

Westby Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 85 species recorded across 7 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 →
7Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
2015–2024Span
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 BlackbirdIcteridae2902024+33%2017
Horned LarkAlaudidae1612024-7%2017
Western MeadowlarkIcteridae1322024+3%2017
Ring-necked PheasantPhasianidae1242024+1%2017
Eared GrebePodicipedidae1212023+100%2016
Mourning DoveColumbidae1052024+17%2017
Common GrackleIcteridae762024+27%2017
Vesper SparrowPasserellidae712024+49%2017
Yellow-headed BlackbirdIcteridae622024+73%2017
Northern ShovelerAnatidae602024+412%2017
Brown-headed CowbirdIcteridae472024-32%2017
Savannah SparrowPasserellidae452024-39%2017
Lark BuntingPasserellidae392016n/an/a
Clay-colored SparrowPasserellidae352024-32%2017
Blue-winged TealAnatidae302024+30%2017
BobolinkIcteridae282024-44%2017
Ruddy DuckAnatidae252023+575%2016
American CootRallidae252024+321%2017
Northern PintailAnatidae212024-27%2019
Eastern KingbirdTyrannidae202024+2%2017
MallardAnatidae172024-16%2017
American RobinTurdidae172024+43%2017
GadwallAnatidae162024+18%2017
Ring-billed GullLaridae152024+23%2017
House SparrowPasseridae132024-25%2017
Chestnut-collared LongspurCalcariidae122024+167%2017
CanvasbackAnatidae122021n/an/a
Baird's SparrowPasserellidae112024-8%2017
Upland SandpiperScolopacidae102024+22%2017
Lesser ScaupAnatidae92024+8%2017
SoraRallidae92023+700%2016
KilldeerCharadriidae92024-82%2017
American GoldfinchFringillidae92023-12%2017
WilletScolopacidae82024+64%2017
Common YellowthroatParulidae82024-43%2017
Marbled GodwitScolopacidae72024-69%2017
Grasshopper SparrowPasserellidae72024-53%2017
Swainson's HawkAccipitridae62024+0%2017
Sedge WrenTroglodytidae62023n/an/a
Northern Rough-winged SwallowHirundinidae52019n/an/a

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