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

Common Poorwill Population Trend in Wyoming

All statesAerial insectivores

Common Poorwill in Wyoming has declined: down 42% on the route-weighted index since 1976.

-42%Since 1976TrendPercent 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 →
40Routes 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 →
45YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Common Poorwill 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 Common Poorwill in Wyoming. See the full index history below.

Common Poorwill Population Forecast in Wyoming

If the recent trend holds, Common Poorwill in Wyoming is projected to fall about 74% by 2030 — from 0.12 in 2025 to a central estimate of 0.03 (95% range 0.00–0.14). A 5-year backtest shows a typical error of ±82.1%, with 60% of held-out values landing inside the 95% band.

-74%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 →
0.00–0.1495% 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 →
±82.1%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, Common Poorwill in Wyoming is projected to fall about 74% by 2030 — from 0.12 in 2025 to a central estimate of 0.03 (95% range 0.00–0.14). A 5-year backtest shows a typical error of ±82.1%, with 60% of held-out values landing inside the 95% band.19722030
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 →
20260.040.000.14
20270.040.000.14
20280.030.000.14
20290.030.000.14
20300.030.000.14

Common Poorwill Survey Routes in Wyoming

Routes recording Common Poorwill 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 →
Teapot Dome819831982
Meeteetse320192014
Black Rock 2320232023
Boulder320252025
Prior Flats220062004
Natrona219901973
Gas Hills 2220252025
Sweetwater220092007
Fletcher Pk220151984
Mtn View219821981
Sybille Cyn220251997
Savery 2220252014
Dubois120152015
Nowood120032003
Fontenelle119871987
Bear Creek120242023
Ervay120242011
Dwyer120252025
Cumberland120171993
Mckinnon119861972
Buford120232017
Moose119811981
Tensleep120152015
Dayton119831983
Arvada120242024

Common Poorwill Population Trend in Other States

arizonacaliforniacoloradoidahokansasmontananebraskanevadanew-mexicooklahomaoregonsouth-dakotatexasutahwashington

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