Long-beaked Echidna (image) Pensoft Publishers Caption The western long-beaked echidna, one of the world's five egg-laying species of mammal, was thought to be extinct in Australia. However scientists have found evidence that it may still roam the country's north-western region. Credit Tim Laman Usage Restrictions CC-BY 3.0 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.