The Guinea Fowl

There are 7 different species of guineafowl.
Guineafowl are both monomorphic and monochromatic - meaning that both sexes have a very similar form and coloration. In other words, it can be difficult to distinguish the sexes.
They are excellent runners and rarely fly, with exception of reaching nocturnal roosting perches.
They roost high in trees at night. Their calls, when disturbed or excited, can be heard over long distances.
Males tend to be very aggressive towards the hens most of the time. One effective way to distinguish the sexes is by observing each individual's body posture. The males tend to carry their heads high and attempt to look as big as possible. Females, on the other hand, tend to adopt a submissive posture.
They can survive long periods without water and tend to acquire the majority of their water requirements from the vegetation that they consume.