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

Black-and-white Warbler In Boreal Hardwood Transition

All regionsBoreal Hardwood TransitionForest birds

Black-and-white Warbler in Boreal Hardwood Transition has surged: up 351% on the route-weighted index since 1968.

+351%Since 1968
125Routes In Region
58Years

Notable Signals

long arc increasecomputed index

Black-and-white Warbler has surged in Boreal Hardwood Transition: up 351% on the route-weighted index since 1968.

Forecast

If the recent trend holds, Black-and-white Warbler in Boreal Hardwood Transition is projected to stay roughly flat through 2029, near 6.5 (95% range 5.4–7.5). A 5-year backtest shows a typical error of ±12.4%, with 40% of held-out values landing inside the 95% band.

-8%Change by 2029
6.5Projected 2029 index
5.4–7.595% range
±12.4%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
20256.25.17.3
20266.35.27.3
20276.35.37.4
20286.45.37.5
20296.55.47.5

Routes In Boreal Hardwood Transition

Routes recording Black-and-white Warbler in Boreal Hardwood Transition.
DebsMINNESOTA242024
JordanMINNESOTA232023
BigforkMINNESOTA212024
NebishMINNESOTA212023
ChisholmMINNESOTA202024
Crane LakeMINNESOTA192024
GlendaleMINNESOTA182024
MellenWISCONSIN182024
Sherry LakeMINNESOTA172022
Nett LakeMINNESOTA172024
MahtowaMINNESOTA152023
Little ForkMINNESOTA142024
Tamarac NwrMINNESOTA142024
Weirgor SpringsWISCONSIN142024
TahquamenonMICHIGAN132024
Hart LakeMINNESOTA132024
BlackduckMINNESOTA132022
FlambeauWISCONSIN132024
CavourWISCONSIN132024
Iron RiverWISCONSIN122024
Amnicon FallsWISCONSIN122024
OntonagonMICHIGAN112019
HermanMICHIGAN112022
Crystal FlsMICHIGAN112024
PickfordMICHIGAN112024

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