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Species · Nevada · BBS 2026 Release · 1966–2025

Costa's Hummingbird Population Trend in Nevada

All statesForest birds

Costa's Hummingbird in Nevada has increased: up 42% on the route-weighted index since 1994.

+42%Since 1994TrendPercent 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 →
4Routes 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 Costa's Hummingbird 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 Costa's Hummingbird in Nevada. See the full index history below.

Costa's Hummingbird Population Forecast in Nevada

If the recent trend holds, Costa's Hummingbird in Nevada is projected to stay roughly flat through 2030, near 0.12 (95% range 0.00–0.28). A 5-year backtest shows a typical error of ±101.3%, with 100% of held-out values landing inside the 95% band.

n/aChange 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 →
0.12Projected 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 →
0.00–0.2895% 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 →
±101.3%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, Costa's Hummingbird in Nevada is projected to stay roughly flat through 2030, near 0.12 (95% range 0.00–0.28). A 5-year backtest shows a typical error of ±101.3%, with 100% of held-out values landing inside the 95% band.19692030
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 →
20260.120.000.28
20270.120.000.28
20280.120.000.28
20290.120.000.28
20300.120.000.28

Costa's Hummingbird Survey Routes in Nevada

Routes recording Costa's Hummingbird 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 →
Beatty320242010
Alamo219691969
Nelson120251995
Ash Meadows119951993

Costa's Hummingbird Population Trend in Other States

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