BirdAnalyst
Species · BCR 17 · BBS 2025 Release · 1966–2024

Brewer's Sparrow In Badlands and Prairies

All regionsBadlands and PrairiesGeneralists

Brewer's Sparrow in Badlands and Prairies has held roughly steady: down 7% on the route-weighted index since 1970.

-7%Since 1970
75Routes In Region
56Years

Notable Signals

No notable trend signals for Brewer's Sparrow in Badlands and Prairies. See the full index history below.

Forecast

If the recent trend holds, Brewer's Sparrow in Badlands and Prairies is projected to fall about 45% by 2029 — from 4.0 in 2024 to a central estimate of 2.2 (95% range 0.00–4.9). A 5-year backtest shows a typical error of ±26.8%, with 100% of held-out values landing inside the 95% band.

-45%Change by 2029
2.2Projected 2029 index
0.00–4.995% range
±26.8%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
20252.30.005.1
20262.30.005.0
20272.30.005.0
20282.20.005.0
20292.20.004.9

Routes In Badlands and Prairies

Routes recording Brewer's Sparrow in Badlands and Prairies.
BucknumWYOMING772024
RavenWYOMING392024
CusterMONTANA372022
ShawneeWYOMING302024
ClarkelenWYOMING281978
Custer 2MONTANA242024
HighlightWYOMING212007
Caballa CrkWYOMING192021
PineyWYOMING181990
Teapot DomeWYOMING161989
SchoonoverWYOMING152024
UptonWYOMING152024
SussexWYOMING152024
WinnettMONTANA142023
BrandenbergMONTANA132019
Flatwillow 2MONTANA132023
RoundupMONTANA132024
GlenrockWYOMING131977
Two DotMONTANA102009
IngomarMONTANA102023
RozetWYOMING102023
NatronaWYOMING91992
BowmanNORTH-DAKOTA82009
HardingSOUTH-DAKOTA82017
SavagetonWYOMING82019

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