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

Chipping Sparrow Population Trend in Wyoming

All statesForest birds

Chipping Sparrow in Wyoming has edged down: down 13% on the route-weighted index since 1970.

-13%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 →
111Routes 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 →
57YearsYears 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 WyomingNotable 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 Wyoming. See the full index history below.

Chipping Sparrow Population Forecast in Wyoming

If the recent trend holds, Chipping Sparrow in Wyoming is projected to rise about 52% by 2030 — from 3.3 in 2025 to a central estimate of 5.0 (95% range 2.0–8.0). A 5-year backtest shows a typical error of ±45.7%, with 100% of held-out values landing inside the 95% band.

+52%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 →
5.0Projected 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 →
2.0–8.095% 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 →
±45.7%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 Wyoming is projected to rise about 52% by 2030 — from 3.3 in 2025 to a central estimate of 5.0 (95% range 2.0–8.0). A 5-year backtest shows a typical error of ±45.7%, 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 →
20264.91.97.9
20274.92.07.9
20284.92.07.9
20295.02.07.9
20305.02.08.0

Chipping Sparrow Survey Routes in Wyoming

Routes recording Chipping Sparrow in Wyoming.
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 →
Moran5120162002
Colter Bay 24320252019
Hampshire2820011994
Ne Entrance2620251982
Mammoth2620251982
Moskee2520011980
Crazy Woman2420241979
Moskee 32120252022
Sundance2020251975
Bill2020011993
Colter Bay1919991968
Hunter Peak1620251982
Buckskin Mtn1420251980
Hayden Val1419861985
Meeteetse1320241992
Bald Mtn1320251990
Fiddler Lk1220251979
Ryan Park1220252013
Alpine1120251979
Yellowstone1120251987
Savery1019951989
Soda Well920251979
Wilson920251979
Highlight920072007
Reliance819781978

Chipping Sparrow Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsin

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