BirdAnalyst
Species · BCR 10 · BBS 2026 Release · 1966–2025

Chipping Sparrow In Northern Rockies

All regionsNorthern RockiesForest birds

Chipping Sparrow in Northern Rockies has edged down: down 23% on the route-weighted index since 1970.

-23%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 →
211Routes In RegionSurvey 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 SignalsNotable 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 Northern Rockies. See the full index history below.

Chipping Sparrow In Northern Rockies Population Forecast

If the recent trend holds, Chipping Sparrow in Northern Rockies is projected to stay roughly flat through 2030, near 8.9 (95% range 4.9–13). A 5-year backtest shows a typical error of ±5%, with 100% of held-out values landing inside the 95% band.

-2%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 →
8.9Projected 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 →
4.9–1395% 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 →
±5%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 Northern Rockies is projected to stay roughly flat through 2030, near 8.9 (95% range 4.9–13). A 5-year backtest shows a typical error of ±5%, 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 →
20269.25.213
20279.15.113
20289.15.013
20299.05.013
20308.94.913

Routes In Northern Rockies

Routes recording Chipping Sparrow in Northern Rockies.
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 →
OchocoOREGON871982
CascadeIDAHO691984
BarnhouseOREGON532025
MoranWYOMING512016
WallowaOREGON492025
CloverlandWASHINGTON432025
Colter Bay 2WYOMING432025
Eagle CreekOREGON422025
ChewelahWASHINGTON372021
MonumentOREGON342025
Fish CreekMONTANA332024
Hells CanyonOREGON322025
NewbridgeOREGON322025
Hash RockOREGON302025
CoolinIDAHO282025
CabartonIDAHO272024
SilviesOREGON272024
ClintonMONTANA262025
Black Mtn.OREGON262004
CusickWASHINGTON262025
Spring LakeWASHINGTON262025
Ne EntranceWYOMING262025
MammothWYOMING262025
DonnellyOREGON252006
CentervilleIDAHO242025

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