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BBS Route · Wyoming · BCR 10

Mammoth Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 127 species recorded across 41 survey years, still active.

127Species 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 →
41Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1982–2024Span
10Observers

Bird Species Found on Wyoming Mammoth

Top 40 of 127 species by most recent count. Each links to its species trend.

Species recorded on the Mammoth 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
Pine SiskinFringillidae752024+37%1985
American RobinTurdidae532024+1%1985
Warbling VireoVireonidae342024+10%1985
Ruby-crowned KingletRegulidae292024+128%1985
Brewer's BlackbirdIcteridae272024+208%1985
Western TanagerCardinalidae242024+83%1985
Chipping SparrowPasserellidae212024+1%1985
Vesper SparrowPasserellidae182024+48%1985
Brewer's SparrowPasserellidae182024+104%1985
Tree SwallowHirundinidae142024-21%1985
Lesser ScaupAnatidae132024+53%1985
Yellow-headed BlackbirdIcteridae122024-3%1985
Swainson's ThrushTurdidae122024+288%2013
Lincoln's SparrowPasserellidae112024+21%1985
Green-tailed TowheePasserellidae102024+64%1985
White-crowned SparrowPasserellidae92024+42%1985
Canada GooseAnatidae82024+70%1988
Savannah SparrowPasserellidae82024-27%1985
Common MerganserAnatidae72018+75%1982
Common RavenCorvidae72024-58%1985
Eared GrebePodicipedidae72016+250%1999
Red-winged BlackbirdIcteridae62024-55%1985
Violet-green SwallowHirundinidae62024-50%1985
Mountain ChickadeeParidae62024+17%1985
American CrowCorvidae61999+500%1987
Common YellowthroatParulidae52024-44%1985
Dusky FlycatcherTyrannidae52024+44%1986
American AvocetRecurvirostridae52024+44%1992
MallardAnatidae42023+7%1986
Ring-necked DuckAnatidae42024-14%1989
Black-billed MagpieCorvidae42024+50%1985
Western MeadowlarkIcteridae42024+50%1985
Yellow WarblerParulidae42024+22%1986
Cedar WaxwingBombycillidae42023+250%2013
Bank SwallowHirundinidae42024+67%2021
Sandhill CraneGruidae32024+67%1986
SoraRallidae32024-40%1985
American CootRallidae32024+13%1985
Wilson's SnipeScolopacidae32024+8%1985
Brown-headed CowbirdIcteridae32024+29%1985

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