It has two horns, although occasionally a third small posterior horn is present. The anterior horn is larger than the posterior, averaging 50cm in length. Black rhinos are essentially solitary, but temporary aggregations of up to a dozen individuals have been observed, with longer-term associations between mothers and daughters. Breeding takes place throughout the year, although peaks in breeding activity occur at varying times in different range countries.
Reproductive maturity is reached at four to six years in females and seven to nine years in males.
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