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Species · Wyoming · BBS 2026 Release · 1966–2025

Ash-throated Flycatcher Population Trend in Wyoming

All statesAerial insectivores

Ash-throated Flycatcher in Wyoming has collapsed: down 95% on the route-weighted index since 1978.

-95%Since 1978TrendPercent 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 →
11Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
12YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Ash-throated Flycatcher Trends in WyomingNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

long arc declinecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Ash-throated Flycatcher has collapsed in Wyoming: down 95% on the route-weighted index since 1978.

Ash-throated Flycatcher Survey Routes in Wyoming

Routes recording Ash-throated Flycatcher in Wyoming.
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 →
Green River919801978
Mckinnon319801977
Reliance219801980
Rock Springs120141977
Rock Springs 2120252025
Baggs120252025
Midvale119741974
Patrick Draw119771977
Lingle119881988
Diamondville119801980
Mtn View119831980

Ash-throated Flycatcher Population Trend in Other States

arizonacaliforniacoloradoidahokansasnevadanew-mexicooklahomaoregontexasutahwashington

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.