Ducks, geese, swans, petrels, and prions, albatrosses, several types of penguins, notably the Humboldt penguin, flamingos, gulls, terns, and alcids, all have webbed feet. Some mammals have webbed feet as well. Beavers and muskrats, capybara, otters, and Hose’s civet are among them.
The flat-headed cat’s and fishing cat’s toes are partially webbed.
Webbed feet are also found in aquatic frogs, toads, and turtles.
The platypus is a unique webbed-footed mammal in that it is one of just five mammals that can lay eggs. Like a beaver, it has a beak and a flat, scaly tail. On the hind legs of male platypuses are poison spurs.