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

Long-billed Curlew Population Trend in Nevada

All statesShorebirds

Long-billed Curlew in Nevada has surged: up 361% on the route-weighted index since 1970.

+361%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 →
44YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Long-billed Curlew 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 →

Long-billed Curlew has surged in Nevada: up 361% on the route-weighted index since 1970.

Long-billed Curlew Population Forecast in Nevada

If the recent trend holds, Long-billed Curlew in Nevada is projected to stay roughly flat through 2029, near 2.2 (95% range 0.04–4.3). A 5-year backtest shows a typical error of ±69.3%, with 100% of held-out values landing inside the 95% band.

-8%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 →
2.2Projected 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 →
0.04–4.395% 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 →
±69.3%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, Long-billed Curlew in Nevada is projected to stay roughly flat through 2029, near 2.2 (95% range 0.04–4.3). A 5-year backtest shows a typical error of ±69.3%, with 100% of held-out values landing inside the 95% band.19682029
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 →
20252.10.004.2
20262.10.004.2
20272.10.004.3
20282.20.014.3
20292.20.044.3

Long-billed Curlew Survey Routes in Nevada

Routes recording Long-billed Curlew 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 →
Ruby Valley 25320242004
Majors Place3120191968
Ruby Valley1120011997
Mill City820232014
Chimney Res.520242005
Piute Mdws320212013
Mizpah320241990
Humboldt Nf 2320242021
Midas220221993
Toiyabe Nf219871987
Charleston Reservoir220242024
Humboldt Nf120192012
Cortez120242024
Walker Can119861970
Eureka120172017
Gardnerville120042002
Dobbin Creek120081998
Minerva120181988
Jarbidge120062006
Nixon119961996
Bald Mtn.120162016
Fallon120191997
Darroughs Hot Spgs120142008

Long-billed Curlew Population Trend in Other States

californiacoloradoidahokansasmontananebraskanew-mexiconorth-dakotaoklahomaoregonsouth-dakotatexasutahwashingtonwyoming

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