Introduction to the Monotremata - Berkeley's introduction to monotremes, with information about their fossil record, biology, systematics, ecology and morphology. The Monotreme Home Page - A wealth of information about platypus and 2 echidna species, including fascinating photographs of hatching and young echidnas. Rainforest Echidna - Rainforest Echidna, photos and text. Rainforest Platypus - Rainforest Platypus, photos and text. Courtesy of Chambers Wildlife Rainforest Lodge, Atherton Tableland, Far North Queensland, Australia Sleep of the Platypus - Article by Henry Gee about the sleeping patterns of the platypus as compared with other mammals.