This platypus image is believed to be a public domain woodcut from the 1800s. Native to eastern Australia, platypuses are small mammals, adults usually weighing about one to four pounds. They are flattish, with a medium length stubby tail. In general, a platypus resembles a thick, brownish, fur-covered hot dog with a head and tail. Short legs that keep the platypus close to the ground further its resemblance to a furry reptile or amphibian.
Dense fur traps a layer of air next to the skin, providing excellent insulation.
The front feet are webbed. You might say they're super-webbed, for the webbing extends well beyond the claws, forming large paddles. Each foot, both front and back, bears five clawed toes. A platypus' nostrils are located on top of its bill, allowing it to breathe when swimming at the surface. It may rest underwater for as long as ten minutes, but can only stay underwater for two minutes when swimming.