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

MacGillivray's Warbler In Southern Rockies / Colorado Plateau

All regionsSouthern Rockies / Colorado PlateauForest birds

MacGillivray's Warbler in Southern Rockies / Colorado Plateau has surged: up 82% on the route-weighted index since 1970.

+82%Since 1970
138Routes In Region
56Years

Notable Signals

long arc increasecomputed index

MacGillivray's Warbler has surged in Southern Rockies / Colorado Plateau: up 82% on the route-weighted index since 1970.

Forecast

If the recent trend holds, MacGillivray's Warbler in Southern Rockies / Colorado Plateau is projected to rise about 32% by 2029 — from 1.6 in 2024 to a central estimate of 2.0 (95% range 1.2–2.9). A 5-year backtest shows a typical error of ±51.6%, with 60% of held-out values landing inside the 95% band.

+32%Change by 2029
2.0Projected 2029 index
1.2–2.995% range
±51.6%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
20252.01.22.8
20262.01.22.8
20272.01.22.8
20282.01.22.8
20292.01.22.9

Routes In Southern Rockies / Colorado Plateau

Routes recording MacGillivray's Warbler in Southern Rockies / Colorado Plateau.
Lost Cr. ResUTAH322018
YampaCOLORADO162023
Mcphee Res.COLORADO142024
AspenCOLORADO122024
Dunckley PasCOLORADO112024
Beck 2UTAH112018
Dolores RivCOLORADO102024
Marshall PasCOLORADO102014
Uintah NfUTAH101994
Heber Mtn.UTAH102024
Book RidgeUTAH92006
Douglas PassCOLORADO82024
Wilson CreekCOLORADO82024
Ragged Mtn.COLORADO82019
HeeneyCOLORADO82019
BeckUTAH81987
SoapstoneUTAH82024
Baxter PassCOLORADO72024
Ant Flat-Ogden CanUTAH72023
Lost LakeCOLORADO62024
CastletonCOLORADO62024
Comanche PkCOLORADO62024
Owl Creek PassCOLORADO62024
Willow PeakCOLORADO52021
Guanella PasCOLORADO52024

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