Species · BCR 12 · BBS 2025 Release · 1966–2024

Philadelphia Vireo In Boreal Hardwood Transition

Philadelphia Vireo in Boreal Hardwood Transition has fallen sharply: down 56% on the route-weighted index since 1973.

-56%Since 1973
31Routes In Region
45Years

Notable Signals

No notable trend signals for Philadelphia Vireo in Boreal Hardwood Transition. See the full index history below.

Forecast

If the recent trend holds, Philadelphia Vireo in Boreal Hardwood Transition is projected to stay roughly flat through 2029, near 0.03 (95% range 0.00–0.07). A 5-year backtest shows a typical error of ±38.1%, with 80% of held-out values landing inside the 95% band.

n/aChange by 2029
0.03Projected 2029 index
0.000.0795% range
±38.1%Backtest error
19702029
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
20250.030.000.08
20260.030.000.08
20270.030.000.08
20280.030.000.08
20290.030.000.07

Routes In Boreal Hardwood Transition

Routes recording Philadelphia Vireo in Boreal Hardwood Transition.
OntonagonMICHIGAN42019
IshpemingMICHIGAN42019
Crystal FlsMICHIGAN31988
BerglandMICHIGAN22022
Imp LakeMICHIGAN22012
HovlandMINNESOTA21998
JordanMINNESOTA22012
HermanMICHIGAN12013
CunardMICHIGAN12016
Lake CityMICHIGAN12001
PickfordMICHIGAN12011
Hiawatha NfMICHIGAN11994
SidnawMICHIGAN12013
Cluster LakesMICHIGAN12007
CromwellMINNESOTA11979
Mille LacsMINNESOTA12010
LockportMINNESOTA12010
Hart LakeMINNESOTA12002
FloodwoodMINNESOTA11972
CohassetMINNESOTA11994
Crane LakeMINNESOTA12024
LudeMINNESOTA12013
McgregorMINNESOTA12004
Sawbill CampMINNESOTA12011
BigforkMINNESOTA11994

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