Bed Bugs and Bats (image) University of Sheffield Share Print E-Mail 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 Share Print E-Mail 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.