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

Snowy Egret Population Trend in Nevada

All statesWetland birds

Snowy Egret in Nevada has collapsed: down 84% on the route-weighted index since 1990.

-84%Since 1990TrendPercent 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 →
12Routes 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 →
27YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Snowy Egret 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 declinecomputed 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 →

Snowy Egret has collapsed in Nevada: down 83% on the route-weighted index since 1990.

Snowy Egret Population Forecast in Nevada

If the recent trend holds, Snowy Egret in Nevada is projected to rise about 25% by 2024 — from 0.12 in 2019 to a central estimate of 0.15 (95% range 0.00–1.0). A 5-year backtest shows a typical error of ±378.8%, with 100% of held-out values landing inside the 95% band.

+25%Change by 2024TrendPercent 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 →
0.15Projected 2024 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–1.095% 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 →
±378.8%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, Snowy Egret in Nevada is projected to rise about 25% by 2024 — from 0.12 in 2019 to a central estimate of 0.15 (95% range 0.00–1.0). A 5-year backtest shows a typical error of ±378.8%, with 100% of held-out values landing inside the 95% band.19782024
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 →
20200.200.001.1
20210.190.001.1
20220.170.001.0
20230.160.001.0
20240.150.001.0

Snowy Egret Survey Routes in Nevada

Routes recording Snowy Egret 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 River520052001
Ruby Valley519991999
Fallon520181992
Ruby Valley 2320192018
Gardnerville220042004
Willis220072007
Midas119921992
Ash Meadows120162016
Nixon119981990
Toiyabe Nf120022002
Mill City120162016
Dobbin Creek120141978

Snowy Egret Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianakansaslouisianamainemarylandmassachusettsmississippimissourinebraskanew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaoklahomaoregonrhode-islandsouth-carolinasouth-dakotatennesseetexasutahvirginiawisconsinwyoming

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