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

Blue Jay In Southern Rockies / Colorado Plateau

All regionsSouthern Rockies / Colorado PlateauGeneralists

Blue Jay in Southern Rockies / Colorado Plateau has declined: down 34% on the route-weighted index since 1986.

-34%Since 1986
8Routes In Region
36Years

Notable Signals

No notable trend signals for Blue Jay in Southern Rockies / Colorado Plateau. See the full index history below.

Forecast

If the recent trend holds, Blue Jay in Southern Rockies / Colorado Plateau is projected to stay roughly flat through 2029, near 0.03 (95% range 0.00–0.07). A 5-year backtest shows a typical error of ±64%, with 80% of held-out values landing inside the 95% band.

n/aChange by 2029
0.03Projected 2029 index
0.00–0.0795% range
±64%Backtest error
19822029
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
20250.030.000.07
20260.030.000.07
20270.030.000.07
20280.030.000.07
20290.030.000.07

Routes In Southern Rockies / Colorado Plateau

Routes recording Blue Jay in Southern Rockies / Colorado Plateau.
HarmonyCOLORADO32024
SummitvilleCOLORADO21999
GardnerCOLORADO21999
Cheesman LkCOLORADO12019
MoscaCOLORADO12002
Gribbles PrkCOLORADO12006
Gold HillCOLORADO12001
Gold Hill 2COLORADO12023

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