The white rhino, in contrast, has a square lip that is used in grazing. Reproduction Breeding occurs throughout the year. The single calf is weaned after 2 years and is independent at 2.5-3.5 years. Behavior Black rhinos frequently wallow in shallow water holes. The water may help cool the rhinos, and the rhinos coat themselves in mud, probably to gain a protective coating against biting flies.
Black rhinos have sedentary, overlapping home ranges.
Males are probably territorial, but they will tolerate the presence of subordinate males. Females with calves generally stay alone, but they sometimes allow attachment of an abandoned juvenile. Rhinos associate at group wallows and will form loose aggregations of up to 13 individuals. Black rhinos are unpredictable and can be dangerous. They have poor eyesight but an excellent sense of smell and will often charge humans, vehicles and campsites if they detect human scent.