Symbiotic and Competition Relationships:

Oxepecker and Rhinoceros - oxepeckers warn the rhino of danger. The rhino gets a tick removal from the oxepeckers.

Tick and elephant -
A tick takes blood from the elephant. The elephant gets hurt.

The animals that graze and the birds -
Many birds follow the grazing animals because the insects in the savanna are disturbed by the grazing animals. The animals don't have a benefit or problem.