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

Hermit Thrush In Boreal Hardwood Transition

All regionsBoreal Hardwood TransitionForest birds

Hermit Thrush in Boreal Hardwood Transition has risen sharply: up 56% on the route-weighted index since 1968.

+56%Since 1968
124Routes In Region
58Years

Notable Signals

long arc increasecomputed index

Hermit Thrush has risen sharply in Boreal Hardwood Transition: up 56% on the route-weighted index since 1968.

Forecast

If the recent trend holds, Hermit Thrush in Boreal Hardwood Transition is projected to rise about 59% by 2029 — from 8.3 in 2024 to a central estimate of 13 (95% range 8.8–17). A 5-year backtest shows a typical error of ±82.4%, with 20% of held-out values landing inside the 95% band.

+59%Change by 2029
13Projected 2029 index
8.8–1795% range
±82.4%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
2025138.317
2026138.417
2027138.617
2028138.717
2029138.817

Routes In Boreal Hardwood Transition

Routes recording Hermit Thrush in Boreal Hardwood Transition.
Betchler LksMICHIGAN542024
SidnawMICHIGAN442024
Land O LakesWISCONSIN402016
GooseneckMICHIGAN372010
Cluster LakesMICHIGAN342010
Gibbs CityMICHIGAN272024
Brocky LakeMICHIGAN272024
EnsignMICHIGAN262010
Nett LakeMINNESOTA262024
MuskallongeMICHIGAN252024
Pine RiverMICHIGAN252021
Scott'S MarshMICHIGAN252010
Big Island LakeMICHIGAN252010
Land O' Lakes 2WISCONSIN232024
ConoverWISCONSIN222024
Eagle RiverWISCONSIN212024
Seney NwrMICHIGAN202024
Popple RiverWISCONSIN192024
RacoMICHIGAN182024
MareniscoMICHIGAN172019
Red OakMICHIGAN162022
JordanMINNESOTA162023
CreightonMICHIGAN152023
Sawbill LndgMINNESOTA152024
Brush CreekMICHIGAN142016

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