BirdAnalyst
Species · Wyoming · BBS 2026 Release · 1966–2025

Peregrine Falcon Population Trend in Wyoming

All statesBirds of prey

Peregrine Falcon in Wyoming has surged: up 129% on the route-weighted index since 1996.

+129%Since 1996TrendPercent 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 →
20Routes 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 →
21YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Peregrine Falcon 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 Peregrine Falcon in Wyoming. See the full index history below.

Peregrine Falcon Population Forecast in Wyoming

If the recent trend holds, Peregrine Falcon in Wyoming is projected to fall about 55% by 2030 — from 0.06 in 2025 to a central estimate of 0.03 (95% range 0.00–0.06). A 5-year backtest shows a typical error of ±67.3%, with 80% of held-out values landing inside the 95% band.

-55%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 →
0.03Projected 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 →
0.00–0.0695% 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 →
±67.3%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, Peregrine Falcon in Wyoming is projected to fall about 55% by 2030 — from 0.06 in 2025 to a central estimate of 0.03 (95% range 0.00–0.06). A 5-year backtest shows a typical error of ±67.3%, with 80% of held-out values landing inside the 95% band.19912030
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 →
20260.030.000.05
20270.030.000.05
20280.030.000.05
20290.030.000.05
20300.030.000.06

Peregrine Falcon Survey Routes in Wyoming

Routes recording Peregrine Falcon 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 →
Hunter Peak220251997
Sand Draw220252025
Ne Entrance120102005
Yellowstone119971995
Prior Flats120052005
Dubois120172017
Ervay120242015
Brookhurst119911991
Seely 2120072007
Riverside120122012
Mammoth120241996
Clark120032003
Moose120002000
Lovell120172017
Tensleep120252025
Crazy Woman119991999
Gebo120232023
Harmony120222022
Moskee 2120192019
Savery 2120252025

Peregrine Falcon Population Trend in Other States

alabamaalaskaarizonacaliforniacoloradoconnecticutdelawareidahoindianamainemarylandmichiganminnesotamontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorkoklahomaoregonpennsylvaniatennesseetexasutahvermontvirginiawashingtonwisconsin

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