They live in pairs and groups of three or four are common. Groups of six or seven may be found in good feeding areas. A baby rhino can weigh up to 110 pounds at birth and weigh as much as 1000 pounds at 18 months old. Egrets and tick birds can be found riding the backs of rhinos feeding on parasites and insects that are stirred up by the rhinos as they walk through the grass. The diet of the rhinoceros is made up of leaves, fruits, twigs and shrubs.
Rhinoceroses breed throught the year.
During the breeding season, a pair may stay together for four months. They breed every few years. The gestation period is from seventeen to nineteen months. A single young is born and is active soon after birth and stays with the mother until another is born. The black rhinoceros could once be found in Africa, south of the Sahara Desert, in bush country, grasslands and open forests.