BirdAnalyst
Species · BCR 11 · BBS 2025 Release · 1966–2024

Brewer's Blackbird In Prairie Potholes

All regionsPrairie PotholesGeneralists

Brewer's Blackbird in Prairie Potholes has surged: up 118% on the route-weighted index since 1969.

+118%Since 1969
93Routes In Region
57Years

Notable Signals

long arc increasecomputed index

Brewer's Blackbird has surged in Prairie Potholes: up 118% on the route-weighted index since 1969.

Forecast

If the recent trend holds, Brewer's Blackbird in Prairie Potholes is projected to fall about 12% by 2029 — from 12 in 2024 to a central estimate of 10 (95% range 6.8–14). A 5-year backtest shows a typical error of ±8.3%, with 100% of held-out values landing inside the 95% band.

-12%Change by 2029
10Projected 2029 index
6.8–1495% range
±8.3%Backtest error
19672029
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
2025106.514
2026106.614
2027106.714
2028106.814
2029106.814

Routes In Prairie Potholes

Routes recording Brewer's Blackbird in Prairie Potholes.
LambertMONTANA1002024
DenbighNORTH-DAKOTA822024
Abercrombie 2NORTH-DAKOTA822017
WhitlashMONTANA672024
GlasgowMONTANA582024
Hay LakeMONTANA572022
Wild RoseNORTH-DAKOTA502024
LockhartMINNESOTA382024
HarlemMONTANA362021
SacoMONTANA332024
GlentanaMONTANA312024
StanleyNORTH-DAKOTA292024
Sun RiverMONTANA282024
Danzig 2NORTH-DAKOTA272024
Bowesmont 2NORTH-DAKOTA272016
OkleeMINNESOTA252021
ClevelandMONTANA252024
ShelbyMONTANA242024
SunburstMONTANA232007
Great FallsMONTANA232024
CarpioNORTH-DAKOTA232023
Lake BronsonMINNESOTA202011
Powers LakeNORTH-DAKOTA182024
ForbesSOUTH-DAKOTA152024
OswegoMONTANA142024

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