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

Chipping Sparrow Population Trend in Washington

All statesForest birds

Chipping Sparrow in Washington has edged down: down 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 →
80Routes 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 WashingtonNotable 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 Washington. See the full index history below.

Chipping Sparrow Population Forecast in Washington

If the recent trend holds, Chipping Sparrow in Washington is projected to rise about 22% by 2030 — from 5.5 in 2025 to a central estimate of 6.7 (95% range 3.1–10). A 5-year backtest shows a typical error of ±32.7%, with 100% of held-out values landing inside the 95% band.

+22%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 →
6.7Projected 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 →
3.1–1095% 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 →
±32.7%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 Washington is projected to rise about 22% by 2030 — from 5.5 in 2025 to a central estimate of 6.7 (95% range 3.1–10). A 5-year backtest shows a typical error of ±32.7%, 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 →
20266.73.010
20276.73.110
20286.73.110
20296.73.110
20306.73.110

Chipping Sparrow Survey Routes in Washington

Routes recording Chipping Sparrow in Washington.
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 →
Cloverland4320251993
Chewelah3720211977
Blewett Pass3220251992
Cusick2620251982
Spring Lake2620251982
E. Mt. Adams2520251995
L Pend O Nwr2220241995
Keller2120071968
Omak Creek2020241996
Leavenworth1720241981
Mcchord1720151996
Mendota1419881977
Lake Chelan1320251988
Snowden1220251971
Nighthawk1220251992
Rainier1220251993
Ardenvoir1119871968
Mazama1120221993
Ellensburg1020251981
Pomeroy920241992
Laurier920251996
Deer Park920151994
Twisp820241969
Ronald820251973
Sullivan Lake 2820252000

Chipping Sparrow Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawest-virginiawisconsinwyoming

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