American Bullfrog (IMAGE) Pensoft Publishers Caption This image shows the invasive American bullfrog species used as an example in this study. This species is considered to be one of the top 100 most invasive alien species in the world by the IUCN Invasive Species Specialist Group. As a consequence, it is probably one of the best documented IAS in the world in terms of distribution and impact, however, much of the data is not openly accessible. Credit Jan Van Der Voort (Hyla vzw) Usage Restrictions CC-BY 4.0 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.