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

Savannah Sparrow In Northern Rockies

All regionsNorthern RockiesGrassland birds

Savannah Sparrow in Northern Rockies has surged: up 132% on the route-weighted index since 1970.

+132%Since 1970
171Routes In Region
56Years

Notable Signals

long arc increasecomputed index

Savannah Sparrow has surged in Northern Rockies: up 132% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Savannah Sparrow in Northern Rockies is projected to stay roughly flat through 2029, near 7.6 (95% range 5.2–10). A 5-year backtest shows a typical error of ±11.5%, with 100% of held-out values landing inside the 95% band.

+3%Change by 2029
7.6Projected 2029 index
5.2–1095% range
±11.5%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
20257.44.99.9
20267.55.09.9
20277.55.010.0
20287.65.110
20297.65.210

Routes In Northern Rockies

Routes recording Savannah Sparrow in Northern Rockies.
BeaverheadMONTANA1252024
Pablo Res.MONTANA1132024
AugustaMONTANA602024
ChestnutMONTANA602024
RaynesfordMONTANA512024
Red RockMONTANA452024
St MaryMONTANA442008
BoulderWYOMING432024
Church HillMONTANA402024
ChewelahWASHINGTON372021
YellowstoneWYOMING362022
Hayden ValWYOMING351986
Willow Creek 2MONTANA322024
Clyde ParkMONTANA322024
PolsonMONTANA282024
St. Mary 2MONTANA282024
Twin BridgesMONTANA241976
Neponset ResUTAH232018
RiversideWYOMING232024
Mtn ViewWYOMING232024
Freeman CreekMONTANA212016
Fort LoganMONTANA212024
HarmonyWYOMING192023
Big SandyWYOMING182024
KalispellMONTANA172024

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