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

Bobolink In Southern Rockies / Colorado Plateau

All regionsSouthern Rockies / Colorado PlateauGrassland birds

Bobolink in Southern Rockies / Colorado Plateau has collapsed: down 84% on the route-weighted index since 1975.

-84%Since 1975
5Routes In Region
43Years

Notable Signals

long arc declinecomputed index

Bobolink has collapsed in Southern Rockies / Colorado Plateau: down 84% on the route-weighted index since 1975.

Forecast

If the recent trend holds, Bobolink in Southern Rockies / Colorado Plateau is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–0.07). A 5-year backtest shows a typical error of ±226%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029
0.00Projected 2029 index
0.00–0.0795% range
±226%Backtest error
19732029
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
20250.000.000.07
20260.000.000.07
20270.000.000.07
20280.000.000.07
20290.000.000.07

Routes In Southern Rockies / Colorado Plateau

Routes recording Bobolink in Southern Rockies / Colorado Plateau.
YampaCOLORADO21987
BufordCOLORADO12024
CastletonCOLORADO11991
CebollaNEW-MEXICO11982
KamasUTAH12024

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