African Crested Rat (2 of 2) (image) Wildlife Conservation Society Caption Researchers from the Wildlife Conservation Society, the University of Oxford, and the National Museums of Kenya have discovered where the African crested rat (or maned rat) gets its poison: the Acokanthera tree, the same source used by East African hunters for poison arrows. Credit Susan Rouse Usage Restrictions One-time usage only. Must use the following credit: Susan Rouse. 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.