Eastern spadefoot toad (IMAGE) University of Rhode Island Caption The Eastern spadefoot toad, actually a primitive frog, may not be so rare after all according to a study by University of Rhode Island researchers who used a seldom-used methodology that turned up many more of the endangered animals than expected. Credit Anne Devan-Song Usage Restrictions None 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.