BirdAnalyst
Species · BCR 10 · BBS 2025 Release · 1966–2024

Chipping Sparrow In Northern Rockies

All regionsNorthern RockiesGeneralists

Chipping Sparrow in Northern Rockies has edged down: down 25% on the route-weighted index since 1970.

-25%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 →
209Routes 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 →
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 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 2029, near 9.0 (95% range 4.9–13). A 5-year backtest shows a typical error of ±4.4%, with 100% of held-out values landing inside the 95% band.

-5%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 →
9.0Projected 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 →
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 →
±4.4%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 Northern Rockies is projected to stay roughly flat through 2029, near 9.0 (95% range 4.9–13). A 5-year backtest shows a typical error of ±4.4%, 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 →
20259.35.213
20269.25.113
20279.15.113
20289.15.013
20299.04.913

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
BarnhouseOREGON592024
MoranWYOMING512016
Big SandyWYOMING472024
Colter Bay 2WYOMING462024
CloverlandWASHINGTON442024
MonumentOREGON412024
ChewelahWASHINGTON372021
DesolationOREGON352007
CusickWASHINGTON352024
Fish CreekMONTANA332024
CoolinIDAHO322024
CabartonIDAHO302023
Eagle CreekOREGON292022
LaurierWASHINGTON282022
AlpineWYOMING282024
SilviesOREGON272024
Black Mtn.OREGON262004
ClintonMONTANA252024
Hells CanyonOREGON252022
DonnellyOREGON252006
Libby DamMONTANA242024
Crazy WomanWYOMING242024
Painted RockMONTANA232022

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