BirdAnalyst
Species · Nevada · BBS 2026 Release · 1966–2025

Chipping Sparrow Population Trend in Nevada

All statesForest birds

Chipping Sparrow in Nevada has edged up: up 15% on the route-weighted index since 1972.

+15%Since 1972TrendPercent 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 →
28Routes 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 →
47YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Chipping Sparrow 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 Chipping Sparrow in Nevada. See the full index history below.

Chipping Sparrow Population Forecast in Nevada

If the recent trend holds, Chipping Sparrow in Nevada is projected to rise about 360% by 2030 — from 0.24 in 2025 to a central estimate of 1.1 (95% range 0.00–2.3). A 5-year backtest shows a typical error of ±183.8%, with 100% of held-out values landing inside the 95% band.

+360%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 →
1.1Projected 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 →
0.00–2.395% 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 →
±183.8%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, Chipping Sparrow in Nevada is projected to rise about 360% by 2030 — from 0.24 in 2025 to a central estimate of 1.1 (95% range 0.00–2.3). A 5-year backtest shows a typical error of ±183.8%, 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 →
20261.10.002.3
20271.10.002.3
20281.10.002.3
20291.10.002.3
20301.10.002.3

Chipping Sparrow Survey Routes in Nevada

Routes recording Chipping Sparrow 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 Valley1820011997
Ranchogrande1620241988
Comins Lake720162005
Jarbidge720151997
Dinner Sta619681968
Vya419731973
Humboldt Nf420191994
Cortez320192018
Austin320182009
Willis320241988
Hawthorne320011997
Calico Spr219741974
Fish Creek220211997
Meadow Vally220252025
Gardnerville220031996
Humboldt Nf 2220252021
Dobbin Creek219731971
Nixon219781978
Midas120141992
Walker Can120241968
Mizpah120191999
Ruby Valley 2120242004
Eureka120242008
Illipah120211971
Majors Place119991993

Chipping Sparrow 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.