Mouse lemur (IMAGE) Field Museum Caption Brown Mouse Lemur, one of the 104 species of lemurs that are currently threatened with extinction. A total of 17 species of lemurs have gone extinct since humans arrived on Madagascar. Credit © Chien C. Lee Usage Restrictions Please include credit License Original 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.