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

Blackburnian Warbler In Boreal Hardwood Transition

All regionsBoreal Hardwood TransitionForest birds

Blackburnian Warbler in Boreal Hardwood Transition has surged: up 201% on the route-weighted index since 1968.

+201%Since 1968
113Routes In Region
58Years

Notable Signals

long arc increasecomputed index

Blackburnian Warbler has surged in Boreal Hardwood Transition: up 201% on the route-weighted index since 1968.

Forecast

If the recent trend holds, Blackburnian Warbler in Boreal Hardwood Transition is projected to rise about 26% by 2029 — from 2.7 in 2024 to a central estimate of 3.4 (95% range 2.4–4.4). A 5-year backtest shows a typical error of ±17.5%, with 80% of held-out values landing inside the 95% band.

+26%Change by 2029
3.4Projected 2029 index
2.4–4.495% range
±17.5%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
20253.22.24.3
20263.32.34.3
20273.32.34.3
20283.42.44.4
20293.42.44.4

Routes In Boreal Hardwood Transition

Routes recording Blackburnian Warbler in Boreal Hardwood Transition.
Sherry LakeMINNESOTA192022
BerglandMICHIGAN162022
Imp LakeMICHIGAN162019
LockportMINNESOTA162024
Sawbill LndgMINNESOTA152024
JordanMINNESOTA122023
BlackduckMINNESOTA122022
Sawbill CampMINNESOTA112024
ChisholmMINNESOTA112024
Crane LakeMINNESOTA102024
Land O LakesWISCONSIN102016
Eagle RiverWISCONSIN102024
Hart LakeMINNESOTA92024
CavourWISCONSIN92024
MareniscoMICHIGAN82019
Popple RiverWISCONSIN82024
RacoMICHIGAN72024
HermanMICHIGAN62013
Gibbs CityMICHIGAN62024
Land O' Lakes 2WISCONSIN62024
MellenWISCONSIN62024
Crystal FlsMICHIGAN52024
TahquamenonMICHIGAN52024
GilchristMICHIGAN52021
Scott'S MarshMICHIGAN52010

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