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

Hooded Merganser In Boreal Hardwood Transition

All regionsBoreal Hardwood TransitionWaterfowl

Hooded Merganser in Boreal Hardwood Transition has increased: up 35% on the route-weighted index since 1970.

+35%Since 1970
68Routes In Region
48Years

Notable Signals

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

Forecast

If the recent trend holds, Hooded Merganser in Boreal Hardwood Transition is projected to rise about 76% by 2029 — from 0.07 in 2024 to a central estimate of 0.12 (95% range 0.02–0.22). A 5-year backtest shows a typical error of ±29.4%, with 100% of held-out values landing inside the 95% band.

+76%Change by 2029
0.12Projected 2029 index
0.02–0.2295% range
±29.4%Backtest error
19682029
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
20250.110.010.22
20260.120.010.22
20270.120.010.22
20280.120.010.22
20290.120.020.22

Routes In Boreal Hardwood Transition

Routes recording Hooded Merganser in Boreal Hardwood Transition.
Tamarac NwrMINNESOTA32023
Crystal FlsMICHIGAN22023
RacoMICHIGAN22001
Pine RiverMINNESOTA22018
NebishMINNESOTA22013
BayfieldWISCONSIN22015
Popple RiverWISCONSIN22017
FlambeauWISCONSIN22013
BootjackMICHIGAN11998
Ned LakeMICHIGAN12009
HermanMICHIGAN11993
Gibbs CityMICHIGAN12009
Maple GroveMICHIGAN12023
IshpemingMICHIGAN12014
Brocky LakeMICHIGAN12008
ShingletonMICHIGAN12002
CreightonMICHIGAN12012
Bear LakeMICHIGAN12021
GilchristMICHIGAN11993
Skegemog PtMICHIGAN12001
PickfordMICHIGAN12019
FredericMICHIGAN11994
Pleasant Valley 2MICHIGAN12024
Walloon Lake 2MICHIGAN12024
Seney NwrMICHIGAN12019

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