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

Clay-colored Sparrow In Northern Rockies

All regionsNorthern RockiesGeneralists

Clay-colored Sparrow in Northern Rockies has surged: up 178% on the route-weighted index since 1970.

+178%Since 1970
50Routes In Region
53Years

Notable Signals

long arc increasecomputed index

Clay-colored Sparrow has surged in Northern Rockies: up 178% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Clay-colored Sparrow in Northern Rockies is projected to stay roughly flat through 2029, near 0.37 (95% range 0.14–0.61). A 5-year backtest shows a typical error of ±31.8%, with 100% of held-out values landing inside the 95% band.

+5%Change by 2029
0.37Projected 2029 index
0.14–0.6195% range
±31.8%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
20250.360.120.60
20260.360.120.60
20270.370.130.60
20280.370.130.61
20290.370.140.61

Routes In Northern Rockies

Routes recording Clay-colored Sparrow in Northern Rockies.
Patrick Draw 5WYOMING242007
St. Mary 2MONTANA122024
Heart ButteMONTANA112024
HarmonyWYOMING111987
GlenMONTANA81980
WalcottWYOMING72014
PolsonMONTANA62024
Wolf CreekMONTANA52019
PathfinderWYOMING52023
Great DivideCOLORADO41977
Pablo Res.MONTANA42024
WorlandWYOMING41994
BaggsWYOMING42004
Patrick Draw 6WYOMING42011
KalispellMONTANA32024
AugustaMONTANA32024
East Glacier ParkMONTANA32024
RaynesfordMONTANA32024
BoulderMONTANA22024
Red RockMONTANA22023
Willow Creek 2MONTANA22024
DuboisWYOMING22017
Hunter PeakWYOMING22010
MooseWYOMING21988
TensleepWYOMING22009

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