BirdAnalyst
Species · BCR 16 · BBS 2025 Release · 1966–2024

Brewer's Blackbird In Southern Rockies / Colorado Plateau

All regionsSouthern Rockies / Colorado PlateauGeneralists

Brewer's Blackbird in Southern Rockies / Colorado Plateau has declined: down 33% on the route-weighted index since 1970.

-33%Since 1970
192Routes In Region
56Years

Notable Signals

No notable trend signals for Brewer's Blackbird in Southern Rockies / Colorado Plateau. See the full index history below.

Forecast

If the recent trend holds, Brewer's Blackbird in Southern Rockies / Colorado Plateau is projected to fall about 55% by 2029 — from 7.8 in 2024 to a central estimate of 3.5 (95% range 0.00–17). A 5-year backtest shows a typical error of ±25.9%, with 100% of held-out values landing inside the 95% band.

-55%Change by 2029
3.5Projected 2029 index
0.00–1795% range
±25.9%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
20255.10.0019
20264.70.0018
20274.30.0018
20283.90.0018
20293.50.0017

Routes In Southern Rockies / Colorado Plateau

Routes recording Brewer's Blackbird in Southern Rockies / Colorado Plateau.
KamasUTAH1232024
YampaCOLORADO1042023
M Warner ResUTAH642024
Ant Flat-Ogden CanUTAH602023
AlamosaCOLORADO592024
Pagosa SpgsCOLORADO561982
DoloresCOLORADO551987
BufordWYOMING502024
Gribbles PrkCOLORADO482024
Angel FireNEW-MEXICO472002
De BequeCOLORADO422024
Yellowjacket PassCOLORADO332024
Fletcher PkWYOMING312024
Wilson CreekCOLORADO302024
Alton 2UTAH282024
PaoniaCOLORADO272024
Cochetopa PassCOLORADO272024
DoylevilleCOLORADO252024
MoscaCOLORADO252024
FalfaCOLORADO242024
CastletonCOLORADO232024
PowderhornCOLORADO232023
Stinking Lk.NEW-MEXICO231999
Cortez 2COLORADO222017
Deadman Rd.COLORADO212024

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