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Species · Wyoming · BBS 2025 Release · 1966–2024

Gray Flycatcher Population Trend in Wyoming

All statesAerial insectivores

Gray Flycatcher in Wyoming has fallen sharply: down 61% on the route-weighted index since 1990.

-61%Since 1990TrendPercent 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 →
12Routes 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 →
19YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Gray 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 →

Gray Flycatcher has fallen sharply in Wyoming: down 61% on the route-weighted index since 1990.

Gray Flycatcher Population Forecast in Wyoming

If the recent trend holds, Gray Flycatcher in Wyoming is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–0.20). A 5-year backtest shows a typical error of ±166.5%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029TrendPercent 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 →
0.00Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.2095% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±166.5%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Gray Flycatcher in Wyoming is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–0.20). A 5-year backtest shows a typical error of ±166.5%, with 100% of held-out values landing inside the 95% band.19812029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20250.010.000.21
20260.010.000.21
20270.010.000.21
20280.000.000.20
20290.000.000.20

Gray Flycatcher Survey Routes in Wyoming

Routes recording Gray 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 →
Reliance919811981
Patrick Draw 2519811981
Mtn View320241981
Green River219811981
Rock Springs120221990
Carter 2120232023
Baggs120232002
Nowood120082008
Fiddler Lk120242024
Pathfinder119871987
Cumberland120232023
Buford120232023

Gray Flycatcher Population Trend in Other States

arizonacaliforniacoloradoidahonevadanew-mexicooregontexasutahwashington

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.