BirdAnalyst
Species · BCR 17 · BBS 2025 Release · 1966–2024

Common Merganser In Badlands and Prairies

All regionsBadlands and PrairiesWaterfowl

Common Merganser in Badlands and Prairies has edged up: up 12% on the route-weighted index since 1979.

+12%Since 1979
23Routes In Region
34Years

Notable Signals

No notable trend signals for Common Merganser in Badlands and Prairies. See the full index history below.

Forecast

If the recent trend holds, Common Merganser in Badlands and Prairies is projected to fall about 47% by 2029 — from 0.09 in 2024 to a central estimate of 0.05 (95% range 0.00–0.13). A 5-year backtest shows a typical error of ±55.5%, with 100% of held-out values landing inside the 95% band.

-47%Change by 2029
0.05Projected 2029 index
0.00–0.1395% range
±55.5%Backtest error
19762029
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
20250.050.000.13
20260.050.000.13
20270.050.000.13
20280.050.000.13
20290.050.000.13

Routes In Badlands and Prairies

Routes recording Common Merganser in Badlands and Prairies.
FlatwillowMONTANA41977
Caballa CrkWYOMING42008
Maynard CouleeMONTANA32022
MayoworthWYOMING32010
Seely 2WYOMING32008
CircleMONTANA22000
Two DotMONTANA22024
St Xavier 2MONTANA22018
Wheat BasinMONTANA22019
VolunteerSOUTH-DAKOTA21983
DwyerWYOMING21992
ArvadaWYOMING22024
SeelyWYOMING21994
SussexWYOMING22023
HighwoodMONTANA12024
BrusettMONTANA11985
ShawmutMONTANA12005
Reed PointMONTANA12024
RochfordSOUTH-DAKOTA11995
NatronaWYOMING11990
DaytonWYOMING12022
SchoonoverWYOMING11995
WelchWYOMING12017

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