Bed Bugs and Bats (IMAGE) University of Sheffield Caption Bedbugs are older than bats - a mammal that people had previously believed to be their first host 50-60 million years ago. Bedbugs in fact evolved around 50 million years earlier. Credit Mark Chappell, University of Cailfornia, Riverside Usage Restrictions Credit Mark Chappell, University of Cailfornia, Riverside 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.