Servals are recognized by their black-spotted tawny coats, and longer than normal legs and necks. As they prefer to hunt in tall savannah grass this added height do help a lot.
Serval - Predator cats of Southern Africa

The Serval has an extreme good sense of hearing, and when observing them in the wild, it is the first thing you would notice. Standing absolutely still and just the ears move as they listen.

The Serval are widespread in water rich savannas areas in Southern Africa. As their main diet consists of rodents and small birds, they prefer places of thick bush, tall grass, or reed-beds on the bank of a river. Being very effective hunters, and rarely eat old dead meat.