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Species · Nevada · BBS 2026 Release · 1966–2025

California Quail Population Trend in Nevada

All statesGame birds

California Quail in Nevada has surged: up 35× on the route-weighted index since 1970.

35×Since 1970TrendPercent 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 →
23Routes 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 California Quail 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 →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

California Quail has surged in Nevada: up 35× on the route-weighted index since 1970.

California Quail Population Forecast in Nevada

If the recent trend holds, California Quail in Nevada is projected to rise about 72% by 2030 — from 3.9 in 2025 to a central estimate of 6.7 (95% range 2.3–11). A 5-year backtest shows a typical error of ±53.8%, with 100% of held-out values landing inside the 95% band.

+72%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 →
6.7Projected 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 →
2.3–1195% 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 →
±53.8%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, California Quail in Nevada is projected to rise about 72% by 2030 — from 3.9 in 2025 to a central estimate of 6.7 (95% range 2.3–11). A 5-year backtest shows a typical error of ±53.8%, with 100% of held-out values landing inside the 95% band.19682030
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 →
20266.31.811
20276.41.911
20286.52.111
20296.62.211
20306.72.311

California Quail Survey Routes in Nevada

Routes recording California Quail 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 →
Carson River6520052001
Fallon4620251992
Gardnerville 21220252013
Gardnerville1120121992
Sand Pass1020251987
Chimney Res.820252007
Willis519951994
Rye Patch319871970
Oreana320032002
Piute Mdws220252014
Midas220252001
Comins Lake220092005
Ranchogrande220242024
Nixon220251975
Fish Creek120081997
Virgin Creek120181995
Frenchman119781977
Toiyabe Nf119871987
Ruby Valley 2120242024
Majors Place119721968
Jarbidge120122012
Mill City120172016
Bald Mtn.120122012

California Quail Population Trend in Other States

californiaidahomontananew-mexicooregonutahwashington

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