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

Fox Sparrow In Northern Rockies

All regionsNorthern RockiesGeneralists

Fox Sparrow in Northern Rockies has increased: up 43% on the route-weighted index since 1970.

+43%Since 1970
91Routes In Region
55Years

Notable Signals

No notable trend signals for Fox Sparrow in Northern Rockies. See the full index history below.

Forecast

If the recent trend holds, Fox Sparrow in Northern Rockies is projected to fall about 14% by 2029 — from 0.92 in 2024 to a central estimate of 0.79 (95% range 0.33–1.3). A 5-year backtest shows a typical error of ±16.8%, with 100% of held-out values landing inside the 95% band.

-14%Change by 2029
0.79Projected 2029 index
0.33–1.395% range
±16.8%Backtest error
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 index95% low95% high
20250.770.311.2
20260.770.311.2
20270.780.321.2
20280.790.331.2
20290.790.331.3

Routes In Northern Rockies

Routes recording Fox Sparrow in Northern Rockies.
Buckskin MtnWYOMING212021
Logan PassMONTANA202024
Whitefish LakeMONTANA172024
AveryIDAHO112023
Big SandyWYOMING112024
Lolo PassIDAHO92019
ChallisIDAHO82024
CentervilleIDAHO82019
WoodruffUTAH82024
AlpineWYOMING82024
PierceIDAHO72007
WilsonWYOMING62024
Spring LakeWASHINGTON52024
Colter BayWYOMING51999
Colter Bay 2WYOMING52024
Fish CreekMONTANA42024
Hebgen LakeMONTANA42024
Inside RoadMONTANA42024
CloverlandWASHINGTON42024
OttoWYOMING41987
Great DivideCOLORADO31977
Baldy MountainIDAHO32016
ChestnutMONTANA32009
OchocoOREGON32021
NorthportWASHINGTON31997

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