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Species · Wyoming · BBS 2026 Release · 1966–2025

Hammond's Flycatcher Population Trend in Wyoming

All statesAerial insectivores

Hammond's Flycatcher in Wyoming has surged: up 12× on the route-weighted index since 1984.

12×Since 1984TrendPercent 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 →
22Routes 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 →
43YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Hammond's 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 →

No notable trend signals for Hammond's Flycatcher in Wyoming. See the full index history below.

Hammond's Flycatcher Population Forecast in Wyoming

If the recent trend holds, Hammond's Flycatcher in Wyoming is projected to fall about 39% by 2030 — from 0.78 in 2025 to a central estimate of 0.47 (95% range 0.22–0.73). A 5-year backtest shows a typical error of ±53%, with 40% of held-out values landing inside the 95% band.

-39%Change by 2030TrendPercent 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 →
0.47Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.22–0.7395% 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 →
±53%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, Hammond's Flycatcher in Wyoming is projected to fall about 39% by 2030 — from 0.78 in 2025 to a central estimate of 0.47 (95% range 0.22–0.73). A 5-year backtest shows a typical error of ±53%, with 40% of held-out values landing inside the 95% band.19812030
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 →
20260.440.180.69
20270.450.190.70
20280.460.200.71
20290.470.210.72
20300.470.220.73

Hammond's Flycatcher Survey Routes in Wyoming

Routes recording Hammond's 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 →
Alpine2120251990
Hunter Peak1720251983
Buckskin Mtn1020251992
Soda Lake720251994
Ne Entrance420251989
Mammoth420251983
Wilson420251981
Colter Bay 2320232023
Big Sandy319901990
Fiddler Lk320252022
Moose220251999
Crazy Woman220242004
Yellowstone120232000
Sundance120102005
Dubois120182018
Fontenelle120112011
Bald Mtn119991992
Horse Creek120222022
Warbonnet120102010
Fletcher Pk120242012
Fox Park119971997
Ryan Park120252022

Hammond's Flycatcher Population Trend in Other States

alaskaarizonacaliforniacoloradoidahomontananew-mexicooregonutahwashington

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