Tree hyrax (IMAGE) University of Helsinki Caption Tree hyraxes (Dendrohyrax sp.) of Taita mountain forests of Kenya are middle-sized nocturnal mammals. Credit Hanna Rosti, hanna.rosti@helsinki.fi Usage Restrictions Photo to be used by permission of the photographer only. License Original 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.