BirdAnalyst
Species · Utah · BBS 2025 Release · 1966–2024

Common Poorwill Population Trend in Utah

All statesAerial insectivores

Common Poorwill in Utah has edged down: down 20% on the route-weighted index since 1989.

-20%Since 1989TrendPercent 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 →
45Routes 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 →
34YearsYears 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 UtahNotable 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 Utah. See the full index history below.

Common Poorwill Population Forecast in Utah

If the recent trend holds, Common Poorwill in Utah is projected to stay roughly flat through 2029, near 0.07 (95% range 0.01–0.12). A 5-year backtest shows a typical error of ±22.8%, with 100% of held-out values landing inside the 95% band.

-4%Change 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 →
0.07Projected 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 →
0.01–0.1295% 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 →
±22.8%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 Utah is projected to stay roughly flat through 2029, near 0.07 (95% range 0.01–0.12). A 5-year backtest shows a typical error of ±22.8%, 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 →
20250.070.010.13
20260.070.010.12
20270.070.010.12
20280.070.010.12
20290.070.010.12

Common Poorwill Survey Routes in Utah

Routes recording Common Poorwill in Utah.
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 →
Randolph320241998
Hatch320052005
Grizzly Rdge220232023
Saleratus Cr220182017
Oak City219901981
Crawford Mts220102004
Iron Springs219921992
Shivwitz220152006
Hanna220042000
Moquith Mtn219991996
Wellington 3120182015
Promontory120042004
Timpie Spg119951995
Lost Cr. Res120132001
Altonah119941994
E. Bear Lake120222012
Bryce Canyon120222006
Navajo Lake120162016
Boulder120111996
Grouse Creek120102010
Wellington 2120092004
M Warner Res120231995
Callao120192019
Fayette120151999
Skyline Driv120062006

Common Poorwill Population Trend in Other States

arizonacaliforniacoloradoidahokansasmontananebraskanevadanew-mexicooklahomaoregonsouth-dakotatexaswashingtonwyoming

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