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Species · Nevada · BBS 2026 Release · 1966–2025

American Crow Population Trend in Nevada

All statesGeneralists

American Crow in Nevada has surged: up 14× on the route-weighted index since 1970.

14×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 →
29Routes 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 American Crow 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 →

American Crow has surged in Nevada: up 14× on the route-weighted index since 1970.

American Crow Population Forecast in Nevada

If the recent trend holds, American Crow in Nevada is projected to rise about 51% by 2030 — from 1.7 in 2025 to a central estimate of 2.5 (95% range 0.00–7.3). A 5-year backtest shows a typical error of ±291.1%, with 100% of held-out values landing inside the 95% band.

+51%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 →
2.5Projected 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 →
0.00–7.395% 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 →
±291.1%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, American Crow in Nevada is projected to rise about 51% by 2030 — from 1.7 in 2025 to a central estimate of 2.5 (95% range 0.00–7.3). A 5-year backtest shows a typical error of ±291.1%, 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 →
20262.50.007.3
20272.50.007.3
20282.50.007.3
20292.50.007.3
20302.50.007.3

American Crow Survey Routes in Nevada

Routes recording American Crow 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 →
Toiyabe Nf6620241987
Ruby Valley 22620242004
Ruby Valley2120011999
Carson River1620022001
Meadow Vally1420252001
Majors Place1020241989
Fallon720251992
Austin520102008
Chimney Res.520252013
Ranchogrande420232009
Humboldt Nf 2420252024
Nixon419971991
Gardnerville 2420252013
Rye Patch319871969
Gardnerville320121992
Midas220141990
Comins Lake220082005
Sand Pass219981998
Fish Creek220211998
Eureka220111968
Jarbidge220122012
Hawthorne219991997
Piute Mdws120252013
Humboldt Nf120151993
Walker Can120181972

American Crow Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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