BirdAnalyst
Species · BCR 10 · BBS 2025 Release · 1966–2024

Warbling Vireo In Northern Rockies

All regionsNorthern RockiesForest birds

Warbling Vireo in Northern Rockies has surged: up 85% on the route-weighted index since 1970.

+85%Since 1970
191Routes In Region
56Years

Notable Signals

long arc increasecomputed index

Warbling Vireo has surged in Northern Rockies: up 85% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Warbling Vireo in Northern Rockies is projected to stay roughly flat through 2029, near 9.8 (95% range 7.8–12). A 5-year backtest shows a typical error of ±17.3%, with 40% of held-out values landing inside the 95% band.

-2%Change by 2029
9.8Projected 2029 index
7.8–1295% range
±17.3%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
20259.57.512
20269.67.612
20279.77.612
20289.77.712
20299.87.812

Routes In Northern Rockies

Routes recording Warbling Vireo in Northern Rockies.
ClancyMONTANA512023
Fish CreekMONTANA502024
CascadeIDAHO491984
ArleeMONTANA432024
AlpineWYOMING432024
Hunter PeakWYOMING422024
Rochat DivdeIDAHO382023
Wise RiverMONTANA382024
Colter Bay 2WYOMING362024
ChallisIDAHO342024
CabartonIDAHO342023
Cramer CreekMONTANA342019
MammothWYOMING342024
SulaMONTANA332024
LimaMONTANA332024
Pryor Mtn.MONTANA332024
Soda LakeWYOMING332024
Cape HornIDAHO322024
Hebgen LakeMONTANA322024
Logan PassMONTANA322024
N Fork Cda RIDAHO312019
ChestnutMONTANA312024
SaveryWYOMING311995
WilsonWYOMING312024
Fiddler LkWYOMING312024

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