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

Tennessee Warbler In Boreal Hardwood Transition

All regionsBoreal Hardwood TransitionForest birds

Tennessee Warbler in Boreal Hardwood Transition has surged: up 163% on the route-weighted index since 1970.

+163%Since 1970
62Routes In Region
55Years

Notable Signals

long arc increasecomputed index

Tennessee Warbler has surged in Boreal Hardwood Transition: up 163% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Tennessee Warbler in Boreal Hardwood Transition is projected to fall about 46% by 2029 — from 0.55 in 2024 to a central estimate of 0.29 (95% range 0.00–0.68). A 5-year backtest shows a typical error of ±48%, with 100% of held-out values landing inside the 95% band.

-46%Change by 2029
0.29Projected 2029 index
0.00–0.6895% range
±48%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
20250.290.000.68
20260.290.000.68
20270.290.000.68
20280.290.000.68
20290.290.000.68

Routes In Boreal Hardwood Transition

Routes recording Tennessee Warbler in Boreal Hardwood Transition.
ChisholmMINNESOTA152024
GlendaleMINNESOTA102024
Crane LakeMINNESOTA62023
Sawbill CampMINNESOTA62024
MareniscoMICHIGAN52019
Isabella 2MICHIGAN52014
SidnawMICHIGAN52007
LockportMINNESOTA52024
Imp LakeMICHIGAN42007
IsabellaMICHIGAN32009
Sand LakeMICHIGAN32000
ShingletonMICHIGAN22023
MayfieldMICHIGAN22001
JordanMINNESOTA22023
OntonagonMICHIGAN11971
BerglandMICHIGAN11990
BootjackMICHIGAN11994
HermanMICHIGAN12022
Crystal FlsMICHIGAN11992
Maple GroveMICHIGAN11997
Brocky LakeMICHIGAN12019
CunardMICHIGAN11997
CreightonMICHIGAN12009
MuskallongeMICHIGAN12011
TahquamenonMICHIGAN11988

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