Family Time (IMAGE) University of Colorado at Boulder Caption A family of prairie voles. Prairie voles are among only about 5% of mammalian species, including humans, which mate for life. Credit Zoe Donaldson/CU Boulder Usage Restrictions Must credit CU Boulder 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.