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

Chipping Sparrow Population Trend in Washington

All statesGeneralists

Chipping Sparrow in Washington has edged down: down 18% on the route-weighted index since 1970.

-18%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 →
78Routes 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 →
56YearsYears 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 stay roughly flat through 2029, near 6.8 (95% range 3.2–10). A 5-year backtest shows a typical error of ±35.6%, with 100% of held-out values landing inside the 95% band.

-2%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 →
6.8Projected 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 →
3.2–1095% 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 →
±35.6%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 stay roughly flat through 2029, near 6.8 (95% range 3.2–10). A 5-year backtest shows a typical error of ±35.6%, 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 →
20256.73.110
20266.83.110
20276.83.110
20286.83.210
20296.83.210

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 →
Cloverland4420241993
Chewelah3720211977
Cusick3520241982
Laurier2820221996
Snowden2520241971
L Pend O Nwr2220241995
Keller2120071968
Blewett Pass2120241992
Lake Chelan2120241988
E. Mt. Adams2120241995
Spring Lake2020241982
Nighthawk2020241992
Omak Creek2020241996
Northport1920241996
Rainier1920191993
Leavenworth1720241981
Mcchord1720151996
Mendota1419881977
Ellensburg1320241981
Ardenvoir1119871968
Twin Lakes1120241983
Mazama1120221993
Ronald920241973
Pomeroy920241992
Deer Park920151994

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 2026-05-22.