Rhinos are pachyderms, and do not sweat. A coating of mud offers a means of cooling the body. Mud can take over an hour to dry and absorbs body heat in the process. A thick coating of mud also offers protection from flies, ticks, and lice. Black rhino males are essentially solitary and have individual territories, but these are not strictly held.
Territories often overlap, and several males often share a common water hole.
Female black rhinos often share overlapping ranges but are solitary except during estrus and when they have young. Suckling calves travel with their mothers and sometimes with the previous offspring, if that offspring is female. It has often been reported that the horn is an aphrodisiac. Scientific studies show that there are no therapeutic effect or aphrodisiac properties in any rhino product. The Asian small-clawed otter is found in Southeast Asia, Southeast China, Malay Peninsula, Southern India, Hainan, Sumatra, Java, Borneo, and Palawan.