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

American Bittern In Boreal Hardwood Transition

All regionsBoreal Hardwood TransitionWetland birds

American Bittern in Boreal Hardwood Transition has held roughly steady: down 5% on the route-weighted index since 1968.

-5%Since 1968
104Routes In Region
58Years

Notable Signals

No notable trend signals for American Bittern in Boreal Hardwood Transition. See the full index history below.

Forecast

If the recent trend holds, American Bittern in Boreal Hardwood Transition is projected to rise about 44% by 2029 — from 0.33 in 2024 to a central estimate of 0.48 (95% range 0.02–0.94). A 5-year backtest shows a typical error of ±54.6%, with 100% of held-out values landing inside the 95% band.

+44%Change by 2029
0.48Projected 2029 index
0.02–0.9495% range
±54.6%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
20250.490.030.95
20260.490.020.95
20270.480.020.95
20280.480.020.95
20290.480.020.94

Routes In Boreal Hardwood Transition

Routes recording American Bittern in Boreal Hardwood Transition.
Seney NwrMICHIGAN132019
BemidjiMINNESOTA131967
PickfordMICHIGAN112019
ChisholmMINNESOTA92024
BigforkMINNESOTA62021
GreenbushMINNESOTA52024
PhillipsWISCONSIN52022
Sherry LakeMINNESOTA42022
CouderayWISCONSIN42017
Crystal FlsMICHIGAN32023
RacoMICHIGAN32024
Nett LakeMINNESOTA32018
ShanagoldenWISCONSIN31994
Land O' Lakes 2WISCONSIN32022
Weirgor SpringsWISCONSIN32017
MareniscoMICHIGAN22016
Ned LakeMICHIGAN22024
HermanMICHIGAN22013
Gibbs CityMICHIGAN22019
CunardMICHIGAN21983
ShingletonMICHIGAN22003
MuskallongeMICHIGAN22014
GilchristMICHIGAN21980
Lake CityMICHIGAN22006
SkeelsMICHIGAN21969

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