Black rhinoceros have sharp hearing and a keen sense of smell. They may find one another by following the trail of scent each enormous animal leaves behind it on the landscape.
Black rhinoceros boast two horns, the foremost more prominent than the other. Rhino horns grow as much as three inches a year, and have been known to grow up to five feet long. Females use their horns to protect their young, while males use them to battle attackers.
The prominent horn for which rhinos are so well known has also been their downfall. Many animals have been killed for the hard, hairlike growth, which is revered for medicinal uses in China, Taiwan, Hong Kong, and Singapore. The horn is also valued in North Africa and the Middle East as an ornamental dagger handle.