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

Winter Wren In Boreal Hardwood Transition

All regionsBoreal Hardwood TransitionForest birds

Winter Wren in Boreal Hardwood Transition has surged: up 252% on the route-weighted index since 1968.

+252%Since 1968
117Routes In Region
58Years

Notable Signals

long arc increasecomputed index

Winter Wren has surged in Boreal Hardwood Transition: up 252% on the route-weighted index since 1968.

Forecast

If the recent trend holds, Winter Wren in Boreal Hardwood Transition is projected to rise about 50% by 2029 — from 2.7 in 2024 to a central estimate of 4.1 (95% range 2.2–5.9). A 5-year backtest shows a typical error of ±58.8%, with 80% of held-out values landing inside the 95% band.

+50%Change by 2029
4.1Projected 2029 index
2.2–5.995% range
±58.8%Backtest error
19662029
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
20253.92.05.8
20263.92.15.8
20274.02.15.9
20284.02.15.9
20294.12.25.9

Routes In Boreal Hardwood Transition

Routes recording Winter Wren in Boreal Hardwood Transition.
Gibbs CityMICHIGAN232024
GlendaleMINNESOTA162024
Land O LakesWISCONSIN142016
JordanMINNESOTA122023
Crane LakeMINNESOTA102024
MareniscoMICHIGAN92019
Brocky LakeMICHIGAN92024
Washington IWISCONSIN92024
Maple GroveMICHIGAN82024
LockportMINNESOTA72024
Hart LakeMINNESOTA72024
Sawbill CampMINNESOTA72024
Eagle RiverWISCONSIN72024
IshpemingMICHIGAN62023
MuskallongeMICHIGAN62024
HovlandMINNESOTA62024
BigforkMINNESOTA62024
Red LakeMINNESOTA62024
ChisholmMINNESOTA62024
Walloon LakeMICHIGAN52004
Pleasant Valley 2MICHIGAN52024
Cedar RunMICHIGAN51999
Imp LakeMICHIGAN52019
Pine RiverMICHIGAN52021
Hiawatha NfMICHIGAN52024

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