The platypus is a small semiaquatic mammal native to eastern Australia. It has the bill of a duck and tail of a beaver but also lays eggs. The platypus weighs between 700g to 2.3kg, is 5-15 inches long, and has brown fur and a leathery skin. It breathes through its nostrils, lays eggs, and its young are called muggles. The platypus is endangered due to a fungal infection.