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

Song Sparrow In Northern Rockies

All regionsNorthern RockiesForest birds

Song Sparrow in Northern Rockies has increased: up 29% on the route-weighted index since 1970.

+29%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 →
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 Song Sparrow in Northern Rockies. See the full index history below.

Song Sparrow In Northern Rockies Population Forecast

If the recent trend holds, Song Sparrow in Northern Rockies is projected to stay roughly flat through 2030, near 6.5 (95% range 4.3–8.6). A 5-year backtest shows a typical error of ±8.1%, with 100% of held-out values landing inside the 95% band.

-0%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 →
6.5Projected 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 →
4.3–8.695% 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 →
±8.1%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, Song Sparrow in Northern Rockies is projected to stay roughly flat through 2030, near 6.5 (95% range 4.3–8.6). A 5-year backtest shows a typical error of ±8.1%, 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 →
20266.44.28.5
20276.44.38.5
20286.44.38.5
20296.44.38.6
20306.54.38.6

Routes In Northern Rockies

Routes recording Song 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 →
CentervilleIDAHO572025
ChallisIDAHO502025
SpartaOREGON402025
NaplesIDAHO332025
BridgeportOREGON332025
Thompson RivMONTANA322024
WilsonWYOMING292025
NezperceIDAHO262012
Donelly 2OREGON262025
CabartonIDAHO252024
LogdellOREGON252025
Buckskin MtnWYOMING252025
SunbeamIDAHO232025
PierceIDAHO222007
WoodruffUTAH212025
Soda LakeWYOMING212025
GoldenIDAHO202016
Fish CreekMONTANA202024
LimaMONTANA182025
NewbridgeOREGON182025
FontenelleWYOMING182025
PathfinderWYOMING182018
Seedskadee 2WYOMING182024
Silver CreekOREGON172025
ChewelahWASHINGTON172021

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