BirdAnalyst
BBS Route · Montana · BCR 11

Glasgow Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 112 species recorded across 38 survey years, still active.

112Species 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 →
38Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1968–2024Span
10Observers

Bird Species Found on Montana Glasgow

Top 40 of 112 species by most recent count. Each links to its species trend.

Species recorded on the Glasgow 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
Horned LarkAlaudidae3962024+91%1970
Ring-billed GullLaridae254202451×1980
Western MeadowlarkIcteridae1472024-40%1970
Rock PigeonColumbidae109202433×1989
Mourning DoveColumbidae842024+44%1970
Brewer's BlackbirdIcteridae582024+10%1970
Common GrackleIcteridae562024+124%1979
Red-winged BlackbirdIcteridae532024+149%1970
Cliff SwallowHirundinidae362024+808%1981
Brown-headed CowbirdIcteridae332024+461%1970
Lark BuntingPasserellidae292024-83%1970
Vesper SparrowPasserellidae242024+117%1970
Eastern KingbirdTyrannidae222024+189%1970
European StarlingSturnidae222024+108%1970
Lark SparrowPasserellidae212024+263%1970
Franklin's GullLaridae202024+67%1969
American RobinTurdidae192024+200%1979
Double-crested CormorantPhalacrocoracidae171968n/an/a
House SparrowPasseridae152024+163%1970
Chestnut-collared LongspurCalcariidae142024-40%1970
Thick-billed LongspurCalcariidae142024+533%2009
Barn SwallowHirundinidae122024+261%1970
Grasshopper SparrowPasserellidae112024+22%1970
BobolinkIcteridae102024+131%2006
Northern ShovelerAnatidae81982+100%1972
American AvocetRecurvirostridae81982n/an/a
Ring-necked PheasantPhasianidae72024-50%1970
Canada GooseAnatidae72024+463%2013
KilldeerCharadriidae62024-38%1970
Sharp-tailed GrousePhasianidae62021+167%1994
Loggerhead ShrikeLaniidae62024+225%1970
Common YellowthroatParulidae62016+50%1979
Eurasian Collared-DoveColumbidae62024+120%2021
Gray PartridgePhasianidae52024+50%1970
Green-winged TealAnatidae51982-50%1979
Bank SwallowHirundinidae52019-58%1980
Wilson's SnipeScolopacidae52007+200%2002
Spotted TowheePasserellidae42024+133%1979
Northern House WrenTroglodytidae42024+15%1970
American GoldfinchFringillidae42024+183%1980

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