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

Common Poorwill Population Trend in Nevada

All statesAerial insectivores

Common Poorwill in Nevada has edged up: up 15% on the route-weighted index since 1971.

+15%Since 1971TrendPercent 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 →
26Routes 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 Common Poorwill Trends in NevadaNotable 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 Nevada. See the full index history below.

Common Poorwill Population Forecast in Nevada

If the recent trend holds, Common Poorwill in Nevada is projected to stay roughly flat through 2029, near 0.19 (95% range 0.00–0.63). A 5-year backtest shows a typical error of ±31.3%, with 100% of held-out values landing inside the 95% band.

+6%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 →
0.19Projected 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 →
0.00–0.6395% 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 →
±31.3%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, Common Poorwill in Nevada is projected to stay roughly flat through 2029, near 0.19 (95% range 0.00–0.63). A 5-year backtest shows a typical error of ±31.3%, with 100% of held-out values landing inside the 95% band.19692029
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 →
20250.200.000.64
20260.200.000.64
20270.200.000.64
20280.190.000.63
20290.190.000.63

Common Poorwill Survey Routes in Nevada

Routes recording Common Poorwill in Nevada.
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 →
Bald Mtn.420231992
Dobbin Creek319701970
Ranchogrande220161995
Eureka219981969
Gardnerville219971997
Gardnerville 2220242024
Piute Mdws120152015
Desert Nwr120241990
Midas120231990
Dinner Sta119901990
Humboldt Nf120052005
Sheldon Nwr120181997
Fish Creek120021997
Cortez120181969
Walker Can120241970
Virgin Creek120171998
Meadow Vally120171996
Ruby Valley 2120192004
Majors Place119911991
Willis120241998
Minerva120121988
Caliente120021988
Jean Lake120111991
Nelson120092006
Ruby Valley119991999

Common Poorwill Population Trend in Other States

arizonacaliforniacoloradoidahokansasmontananebraskanew-mexicooklahomaoregonsouth-dakotatexasutahwashingtonwyoming

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