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Species · Utah · BBS 2025 Release · 1966–2024

MacGillivray's Warbler Population Trend in Utah

All statesForest birds

MacGillivray's Warbler in Utah has surged: up 346% on the route-weighted index since 1970.

+346%Since 1970
51Routes In State
54Years

Notable MacGillivray's Warbler Trends in Utah

long arc increasecomputed index

MacGillivray's Warbler has surged in Utah: up 346% on the route-weighted index since 1970.

MacGillivray's Warbler Population Forecast in Utah

If the recent trend holds, MacGillivray's Warbler in Utah is projected to rise about 60% by 2029 — from 0.97 in 2024 to a central estimate of 1.5 (95% range 0.00–3.6). A 5-year backtest shows a typical error of ±102.8%, with 100% of held-out values landing inside the 95% band.

+60%Change by 2029
1.5Projected 2029 index
0.00–3.695% range
±102.8%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
20251.50.003.5
20261.50.003.5
20271.50.003.5
20281.50.003.6
20291.50.003.6

MacGillivray's Warbler Survey Routes in Utah

Routes recording MacGillivray's Warbler in Utah.
Lost Cr. Res3220181995
Beck 21120181990
Heber Mtn.1020241996
Uintah Nf1019941987
Book Ridge920062003
Beck819871968
Soapstone820241992
Woodruff720242003
Ant Flat-Ogden Can720231994
Grizzly Rdge520241997
Beaver520241979
Navajo Lake520241987
La Sal 3520242007
Moon Lake 2420232004
La Sal 2420062004
Logan Canyon420191998
Hill Creek419951994
Richfield420191994
Hardware Ranch420231994
Hyrum319781975
Skyline Driv320151986
Gooseberry320241994
Dixie Nf320241994
Hanna320231999
Ferron320222000

MacGillivray's Warbler Population Trend in Other States

alaskaarizonacaliforniacoloradoidahomontananevadanew-mexicooregonsouth-dakotatexaswashingtonwyoming

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