The North American beaver (Castor canadensis) is slightly larger than the Eurasian beaver (Castor fiber), and he modifies its environment to a higher degree than almost any other mammalian species in North America. These alterations change water chemistry, local hydrology,…

The Malayan tapir (Tapirus indicus) is the largest terrestrial mammal native to Peninsular Malaysia and one of the most ancient surviving members of the order Perissodactyla — a lineage that has changed little in tens of millions of years. Despite…