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

American Bittern In Prairie Hardwood Transition

All regionsPrairie Hardwood TransitionWetland birds

American Bittern in Prairie Hardwood Transition has collapsed: down 79% on the route-weighted index since 1968.

-79%Since 1968
76Routes In Region
57Years

Notable Signals

long arc declinecomputed index

American Bittern has collapsed in Prairie Hardwood Transition: down 79% on the route-weighted index since 1968.

Forecast

If the recent trend holds, American Bittern in Prairie Hardwood Transition is projected to stay roughly flat through 2029, near 0.00 (95% range 0.00–0.20). A 5-year backtest shows a typical error of ±218.9%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029
0.00Projected 2029 index
0.00–0.2095% range
±218.9%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
20250.000.000.20
20260.000.000.20
20270.000.000.20
20280.000.000.20
20290.000.000.20

Routes In Prairie Hardwood Transition

Routes recording American Bittern in Prairie Hardwood Transition.
No BradleyMICHIGAN42015
HolwayWISCONSIN41983
PardeevilleWISCONSIN41999
MontereyMICHIGAN32023
ElderonWISCONSIN32016
BravoMICHIGAN22021
Drayton PlnsMICHIGAN21975
PrincetonMINNESOTA21990
Sherburne NrMINNESOTA22024
MatherWISCONSIN22023
Wis RapidsWISCONSIN22017
OmroWISCONSIN22000
Fall RiverWISCONSIN22004
Beaver DamWISCONSIN22004
BriggsvilleWISCONSIN22019
ScottvilleMICHIGAN11974
Big Blue LkMICHIGAN12021
New TroyMICHIGAN11985
NashvilleMICHIGAN12005
CoopersvilleMICHIGAN11987
BeldingMICHIGAN11990
GalesburgMICHIGAN11982
RemusMICHIGAN12004
St CharlesMICHIGAN11983
HoltMICHIGAN11978

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