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

Mourning Warbler In Prairie Hardwood Transition

All regionsPrairie Hardwood TransitionForest birds

Mourning Warbler in Prairie Hardwood Transition has declined: down 39% on the route-weighted index since 1968.

-39%Since 1968
72Routes In Region
58Years

Notable Signals

No notable trend signals for Mourning Warbler in Prairie Hardwood Transition. See the full index history below.

Forecast

If the recent trend holds, Mourning Warbler in Prairie Hardwood Transition is projected to rise about 139% by 2029 — from 0.14 in 2024 to a central estimate of 0.33 (95% range 0.05–0.61). A 5-year backtest shows a typical error of ±226.4%, with 40% of held-out values landing inside the 95% band.

+139%Change by 2029
0.33Projected 2029 index
0.05–0.6195% range
±226.4%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
20250.330.050.61
20260.330.050.61
20270.330.050.61
20280.330.050.61
20290.330.050.61

Routes In Prairie Hardwood Transition

Routes recording Mourning Warbler in Prairie Hardwood Transition.
CumberlandWISCONSIN32018
CadottWISCONSIN32019
HatfieldWISCONSIN31979
Wis RapidsWISCONSIN32015
Stevens PtWISCONSIN32023
ScottvilleMICHIGAN22023
No BradleyMICHIGAN22015
Allegan WmaMICHIGAN22002
Barry S.G.A.MICHIGAN22012
Barry S.G.A. 2MICHIGAN22019
EvergreenMINNESOTA22016
HolwayWISCONSIN21989
MerrillWISCONSIN22024
StratfordWISCONSIN22011
SaxevilleWISCONSIN22024
Oconto FallsWISCONSIN22023
OmroWISCONSIN22001
ClintonvilleWISCONSIN22012
New LisbonWISCONSIN22015
PrincetonWISCONSIN22005
Pt WashingtnWISCONSIN22024
GreshamWISCONSIN22024
GrimmsWISCONSIN22013
PackertownINDIANA11993
Big Blue LkMICHIGAN12014

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