BirdAnalyst
Species · BCR 5 · BBS 2025 Release · 1966–2024

Common Merganser In Northern Pacific Rainforest

All regionsNorthern Pacific RainforestWaterfowl

Common Merganser in Northern Pacific Rainforest has declined: down 45% on the route-weighted index since 1970.

-45%Since 1970
107Routes In Region
56Years

Notable Signals

No notable trend signals for Common Merganser in Northern Pacific Rainforest. See the full index history below.

Forecast

If the recent trend holds, Common Merganser in Northern Pacific Rainforest is projected to rise about 288% by 2029 — from 0.29 in 2024 to a central estimate of 1.1 (95% range 0.00–2.5). A 5-year backtest shows a typical error of ±235%, with 100% of held-out values landing inside the 95% band.

+288%Change by 2029
1.1Projected 2029 index
0.00–2.595% range
±235%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
20251.10.002.5
20261.10.002.5
20271.10.002.5
20281.10.002.5
20291.10.002.5

Routes In Northern Pacific Rainforest

Routes recording Common Merganser in Northern Pacific Rainforest.
Cool CampOREGON3132013
DeceptionWASHINGTON842017
AlderpointCALIFORNIA182006
Horse CreekCALIFORNIA152019
Copper RiverALASKA122011
SaladoOREGON112024
Warm BeachWASHINGTON82005
LongvaleCALIFORNIA72023
Bull RunOREGON72023
Junction CtyCALIFORNIA52012
TaholahWASHINGTON52022
Bodega BayCALIFORNIA42021
GlasgowOREGON42018
ProspectOREGON42009
MolallaOREGON42021
South ElmaWASHINGTON42017
KetchikanALASKA32001
HyderALASKA32007
Sitka (Short)ALASKA31992
Shasta LakeCALIFORNIA32007
WedderburnOREGON32004
Emigrant Lake 2OREGON32019
Hurricane RgWASHINGTON32023
JuneauALASKA21989
Thorne BayALASKA22001

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