BirdAnalyst
Species · BCR 23 · BBS 2025 Release · 1966–2024

Black-throated Green Warbler In Prairie Hardwood Transition

All regionsPrairie Hardwood TransitionForest birds

Black-throated Green Warbler in Prairie Hardwood Transition has surged: up 335% on the route-weighted index since 1975.

+335%Since 1975
34Routes In Region
47Years

Notable Signals

long arc increasecomputed index

Black-throated Green Warbler has surged in Prairie Hardwood Transition: up 335% on the route-weighted index since 1975.

Forecast

If the recent trend holds, Black-throated Green Warbler in Prairie Hardwood Transition is projected to stay roughly flat through 2029, near 0.09 (95% range 0.03–0.15). A 5-year backtest shows a typical error of ±55.7%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029
0.09Projected 2029 index
0.03–0.1595% range
±55.7%Backtest error
19712029
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
20250.090.030.15
20260.090.030.15
20270.090.030.15
20280.090.030.15
20290.090.030.15

Routes In Prairie Hardwood Transition

Routes recording Black-throated Green Warbler in Prairie Hardwood Transition.
Indiana DuneINDIANA32003
DeckervilleMICHIGAN32016
Stevens PtWISCONSIN32023
GreshamWISCONSIN32024
ScottvilleMICHIGAN22022
Big Blue LkMICHIGAN22024
MerrillWISCONSIN22023
MatherWISCONSIN22004
LagrangeINDIANA12001
BravoMICHIGAN12022
New TroyMICHIGAN11975
Big RapidsMICHIGAN11987
NashvilleMICHIGAN12009
MontereyMICHIGAN12023
RemusMICHIGAN12021
MottvilleMICHIGAN11998
CohoctahMICHIGAN12021
HungerfordMICHIGAN12014
Chippewa Lk.MICHIGAN11996
New BuffaloMICHIGAN12002
Allegan WmaMICHIGAN12010
Barry S.G.A.MICHIGAN12009
PrincetonMINNESOTA11993
LoraineWISCONSIN12006
CumberlandWISCONSIN12016

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