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

Gray Vireo In Southern Rockies / Colorado Plateau

All regionsSouthern Rockies / Colorado PlateauForest birds

Gray Vireo in Southern Rockies / Colorado Plateau has surged: up 96% on the route-weighted index since 1970.

+96%Since 1970
85Routes In Region
56Years

Notable Signals

long arc increasecomputed index

Gray Vireo has surged in Southern Rockies / Colorado Plateau: up 96% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Gray Vireo in Southern Rockies / Colorado Plateau is projected to stay roughly flat through 2029, near 0.83 (95% range 0.43–1.2). A 5-year backtest shows a typical error of ±20.1%, with 80% of held-out values landing inside the 95% band.

+3%Change by 2029
0.83Projected 2029 index
0.43–1.295% range
±20.1%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
20250.790.391.2
20260.800.401.2
20270.810.411.2
20280.820.421.2
20290.830.431.2

Routes In Southern Rockies / Colorado Plateau

Routes recording Gray Vireo in Southern Rockies / Colorado Plateau.
ShivwitzUTAH192024
Moquith MtnUTAH152024
House RockARIZONA112022
ToroweapARIZONA112024
La Plata 2NEW-MEXICO102016
AltonahUTAH81969
CanyonlandsUTAH82024
AnimasCOLORADO72004
The GapARIZONA61973
Peach SpringARIZONA62024
Glen CanyonUTAH62024
RosevaleCOLORADO52023
Mesaverde NpCOLORADO52024
NotomUTAH52019
BlandingUTAH52024
McgaffeyNEW-MEXICO42023
La PlataNEW-MEXICO42013
HiteUTAH42023
La Sal 3UTAH42024
Blackhead PkCOLORADO32000
Baxter PassCOLORADO32024
AngoraCOLORADO32024
Salt Lake 2NEW-MEXICO32024
EscalanteUTAH32018
Rose WellsARIZONA21969

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