BirdAnalyst
Species · Alaska · BBS 2025 Release · 1966–2024

Warbling Vireo Population Trend in Alaska

All statesForest birds

Warbling Vireo in Alaska has surged: up 778% on the route-weighted index since 1993.

+778%Since 1993
11Routes In State
33Years

Notable Warbling Vireo Trends in Alaska

long arc increasecomputed index

Warbling Vireo has surged in Alaska: up 778% on the route-weighted index since 1993.

Warbling Vireo Population Forecast in Alaska

If the recent trend holds, Warbling Vireo in Alaska is projected to fall about 25% by 2029 — from 0.72 in 2024 to a central estimate of 0.54 (95% range 0.07–1.0). A 5-year backtest shows a typical error of ±30.6%, with 80% of held-out values landing inside the 95% band.

-25%Change by 2029
0.54Projected 2029 index
0.07–1.095% range
±30.6%Backtest error
19902029
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
20250.510.040.98
20260.520.040.99
20270.520.051.00
20280.530.061.0
20290.540.071.0

Warbling Vireo Survey Routes in Alaska

Routes recording Warbling Vireo in Alaska.
Haines1820241991
Stikine River1620241998
Ketchikan1020221998
Skagway520241993
Mitkof Isle520241994
Zimovia Strt220242016
Zarembo220242016
Juneau120021994
Hyder120091995
Thorne Bay119901990
Thorne Bay 2120172016

Warbling Vireo Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawareidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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