Annual North American survey shows diving duck populations dwindling.
The USFWS Just Released Its First Full Duck Count in Three Years, and It's Not Great
Duck numbers down in Minnesota - Duluth News Tribune
Laura's Birding Blog: 2009
Survey says: Ducks down 6 percent across North America - Duluth News Tribune
Waterfowl Survey Produces Mixed Results, Sports
Hunter asks where are the ducks as managers set loose limits
Minnesota, Familypedia
Image 13 of New York journal and advertiser (New York [N.Y.]), October 16, 1897
Shrinking wetlands, rising seas threaten generations of tradition for Louisiana duck hunters
Duck numbers down nationally - Duluth News Tribune
North American spring duck count down - Duluth News Tribune
Good continental duck numbers raise hunters' hopes - Duluth News Tribune
USFWS reports fewer ducks in 2023 surveys