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

Chipping Sparrow Population Trend in Idaho

All statesGeneralists

Chipping Sparrow in Idaho has risen sharply: up 61% on the route-weighted index since 1970.

+61%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 →
58Routes 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 IdahoNotable 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 →

Chipping Sparrow has risen sharply in Idaho: up 61% on the route-weighted index since 1970.

Chipping Sparrow Population Forecast in Idaho

If the recent trend holds, Chipping Sparrow in Idaho is projected to stay roughly flat through 2029, near 6.8 (95% range 3.3–10). A 5-year backtest shows a typical error of ±18.4%, with 100% of held-out values landing inside the 95% band.

+9%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 →
3.3–1095% 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 →
±18.4%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 Idaho is projected to stay roughly flat through 2029, near 6.8 (95% range 3.3–10). A 5-year backtest shows a typical error of ±18.4%, 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 →
20256.73.210
20266.83.210
20276.83.310
20286.83.310
20296.83.310

Chipping Sparrow Survey Routes in Idaho

Routes recording Chipping Sparrow in Idaho.
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 →
Cascade6919841968
Coolin3220241986
Cabarton3020231985
Deep Creek2019851985
Rochat Divde2020231993
Gifford1920171971
Sunbeam1920191994
Cape Horn1820241972
Mivoden1620231977
Avery1620231979
Cobalt1420241989
Alturas1319871968
Featherville1320241989
Dougal Res1320241988
Sawtooth Cty1320141988
Naples1220241972
Centerville1220191972
Magic Mtn1220241987
Baldy Mountain1120162013
Grangeville1020241986
Lolo Pass820191992
Blacks Creek819821973
N Fork Cda R820191993
Yellow Pine820161989
Nezperce720121968

Chipping Sparrow Population Trend in Other States

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

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.