The platypus is a true freak of nature.
Its body is egg-shaped and it grows to be about 14 to 20 inches in length.
Barely classified as a mammal on a technicality, nippleless glands on the mother’s belly secrete a liquid that the newborns lick off her stomach, the platypus has characteristics from more than one animal group.
Like birds, it lays eggs. It also has a bill like a duck and webbed feet.
At the ends of those feet, however, there are catlike claws for digging in the mud for food. Like other mammals, the platypus grows a coat of fur.
On the males, there are spurs inside the back legs that are poisonous.
When frightened, the platypus growls. Normally, it uses a clucking noise to call out to other platypuses.