duck-billed platypus (Ornithorhynchus anatinus) skeleton of platypus
Date 1821
Source Die vergleichende Osteologie
Author Christian Heinrich Pander, 1794-1865
Source: https://commons.wikimedia.org/wiki/File:Die_vergleichende_Osteologie_(1821)_Ornithorhyncus_anatinus.jpg
The platypus or duck-billed platypus (Ornithorhynchus anatinus) is a semiaquatic egg-laying mammal endemic to eastern Australia, including Tasmania. It is one of the extant species of monotremes, the only mammals that lay eggs instead of giving birth.