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

Blue-winged Warbler In Boreal Hardwood Transition

All regionsBoreal Hardwood TransitionForest birds

Blue-winged Warbler in Boreal Hardwood Transition has edged down: down 18% on the route-weighted index since 1980.

-18%Since 1980
24Routes In Region
28Years

Notable Signals

No notable trend signals for Blue-winged Warbler in Boreal Hardwood Transition. See the full index history below.

Forecast

If the recent trend holds, Blue-winged Warbler in Boreal Hardwood Transition is projected to stay roughly flat through 2029, near 0.03 (95% range 0.00–0.07). A 5-year backtest shows a typical error of ±49.6%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029
0.03Projected 2029 index
0.00–0.0795% range
±49.6%Backtest error
19732029
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
20250.030.000.07
20260.030.000.07
20270.030.000.07
20280.030.000.07
20290.030.000.07

Routes In Boreal Hardwood Transition

Routes recording Blue-winged Warbler in Boreal Hardwood Transition.
DebsMINNESOTA32017
Walloon LakeMICHIGAN21980
IrmaWISCONSIN22022
AmbergWISCONSIN22018
Weirgor SpringsWISCONSIN22024
MareniscoMICHIGAN12005
CunardMICHIGAN12021
Bear LakeMICHIGAN12024
Lake CityMICHIGAN11974
SkeelsMICHIGAN12011
OberlinMICHIGAN12006
CathroMICHIGAN12011
Sand LakeMICHIGAN12014
HarriettaMICHIGAN12005
BlackduckMINNESOTA12005
Nett LakeMINNESOTA12018
Tamarac NwrMINNESOTA11998
Grand ViewWISCONSIN12011
Union TwpWISCONSIN11992
CouderayWISCONSIN11996
ExelandWISCONSIN12005
HollisterWISCONSIN11973
Washington IWISCONSIN11973
BashawWISCONSIN12021

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