Birds sometimes perch on the back of rhinoceroses, eating the ticks and other insects. In return the birds warn the rhinoceroses of danger. The most common birds to do this are red-billed ox-peckers.
Diet
The black rhinoceros is a browser, possessing a prehensile upper lip for drawing branches to its mouth. For this reason it is also referred to as the hook-lipped African rhinoceros. They usually feed at dawn and dusk, living on plant material, leaves and fruit, flowers, and also herbs. The rhinoceros is exclusively herbivorous.
Adaptations
The thick skin of the rhinoceros protects it from rough vegetation, and its horns protect it from attackers. The digits are webbed to increase the surface area of the foot and the upper lip has been modified to form a prehensile elongated lip to manoeuvre food.