The Monotremata are a bit of a biological oddity, as they are the only group of mammals to lay eggs rather than give birth to live young. The Monotremata alive today are all found in Australia and New Guinea and consist of four species of echidna and the platypus. The latter is well known for its unusual appearance, as the platypus has a bill like a duck, a tail like a beaver, and feet like an otter.
Publisher: University of Papua New Guinea Press
Publisher: NSW National Parks and Wildlife Service
Series: Abhandlungen der Senckenbergischen Naturforschenden Gesellschaft Volume: 545