BirdAnalyst
Species · BCR 22 · BBS 2025 Release · 1966–2024

Hooded Merganser In Eastern Tallgrass Prairie

All regionsEastern Tallgrass PrairieWaterfowl

Hooded Merganser in Eastern Tallgrass Prairie has fallen sharply: down 75% on the route-weighted index since 1992.

-75%Since 1992
30Routes In Region
25Years

Notable Signals

No notable trend signals for Hooded Merganser in Eastern Tallgrass Prairie. See the full index history below.

Forecast

If the recent trend holds, Hooded Merganser in Eastern Tallgrass Prairie is projected to stay roughly flat through 2029, near 0.02 (95% range 0.00–0.07). A 5-year backtest shows a typical error of ±390.9%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2029
0.02Projected 2029 index
0.00–0.0795% range
±390.9%Backtest error
19782029
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
20250.020.000.07
20260.020.000.07
20270.020.000.07
20280.020.000.07
20290.020.000.07

Routes In Eastern Tallgrass Prairie

Routes recording Hooded Merganser in Eastern Tallgrass Prairie.
CameronILLINOIS61989
Troy GroveILLINOIS42018
Sioux CityIOWA42006
Camp PointILLINOIS32011
NewarkILLINOIS22010
GulfportILLINOIS22014
Concord WestILLINOIS22010
AliceIOWA21994
PiersonIOWA22019
LakevilleMINNESOTA22014
IrvingtonNEBRASKA22004
MinonkILLINOIS12004
PawneeILLINOIS11998
JamestownILLINOIS12012
BeaucoupILLINOIS12012
OlneyILLINOIS12017
SenecaILLINOIS12024
PaysonILLINOIS12016
Grape CreekILLINOIS12022
DudleyvilleILLINOIS12010
KellILLINOIS12006
Kankakee SandsINDIANA12008
GazaIOWA11992
Rock ValleyIOWA11993
Ash CreekMINNESOTA12013

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