How do ducks not freeze in winter, and how do they have such thick feathers? - Quora
Blog Feed Tails of a Twitcher
A Quack-filled Roll Call: Meet the Ducks of the Bird House Smithsonian's National Zoo and Conservation Biology Institute
Blog Feed Tails of a Twitcher
14 birds to watch for on Buzzards Bay this winter (and where to see them!) - Buzzards Bay Coalition
What Do Ducks Eat?
29 Ducks in Connecticut - Birdwatching Central
Gary Clark, Nature Columnist - Houston Chronicle
Branching Out Winter 2019 by Reston Association - Issuu
Waterfowl ID: Discover All Types of Ducks, Geese & More
October Wildlife Viewing - Waterfowl Migration • Nebraskaland Magazine