BirdAnalyst
Species · BCR 14 · BBS 2025 Release · 1966–2024

Hooded Merganser In Atlantic Northern Forest

All regionsAtlantic Northern ForestWaterfowl

Hooded Merganser in Atlantic Northern Forest has surged: up 484% on the route-weighted index since 1969.

+484%Since 1969
66Routes In Region
50Years

Notable Signals

long arc increasecomputed index

Hooded Merganser has surged in Atlantic Northern Forest: up 484% on the route-weighted index since 1969.

Forecast

If the recent trend holds, Hooded Merganser in Atlantic Northern Forest is projected to fall about 42% by 2029 — from 0.19 in 2024 to a central estimate of 0.11 (95% range 0.03–0.20). A 5-year backtest shows a typical error of ±37.1%, with 60% of held-out values landing inside the 95% band.

-42%Change by 2029
0.11Projected 2029 index
0.03–0.2095% range
±37.1%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
20250.110.020.19
20260.110.020.19
20270.110.030.20
20280.110.030.20
20290.110.030.20

Routes In Atlantic Northern Forest

Routes recording Hooded Merganser in Atlantic Northern Forest.
StacyvilleMAINE72021
Bowdoin CtrMAINE61994
FranconiaNEW-HAMPSHIRE42014
Post MillsVERMONT42024
HarmonyMAINE32024
Brownfield 2MAINE32021
Dixville Notch 2NEW-HAMPSHIRE32018
SpeculatorNEW-YORK31980
BrooksMAINE22013
CarrabassettMAINE22008
CharlestonMAINE21993
JeffersonMAINE22008
MontereyMASSACHUSETTS22019
Dixvil NotchNEW-HAMPSHIRE22013
Jeffers NtchNEW-HAMPSHIRE22016
NewcastleMAINE12003
Wilson MillsMAINE12019
GreenwoodMAINE12017
ReedsMAINE12010
Otisfield GrMAINE12014
HartfordMAINE12009
ManchesterMAINE11982
EastbrookMAINE12019
HancockMAINE12010
AuroraMAINE12017

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