Platypus (Ornithorhynchus anatinus) (IMAGE) De Gruyter Caption The Platypus (Ornithorhynchus anatinus) is one of the oddities of nature: a mammal that lays eggs, and is like a mix of several other animals being duck-billed, beaver-tailed, and otter-footed. Credit Goddard Photography Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.