Both sexes of Guinea Fowl can have mixture of straight and curled wattles which can make determining their gender a little tricky. But here are a few handy tips for figuring out the boys from the girls.
Male Guinea Fowl are called Cocks.
Female Guinea Fowl are called Hens.
The young are called Keets.
As keets, its nearly impossible to figure out their gender until around 8 weeks of age when they start to make more distinctive calls. Wattle sexing can take a few more months before determining.
Behaviour - The males will also often prance, with their wings held up, and race at other birds (although not reliable).
Females - make a "come back" or a "buck wheat" sound, or a squeaky wheel barrow sound. Girls can imitate the male's call.
Males - make a single sound of "CHI-CHI-chi-chi" - some say its more of an "Eeeeep"
Both sexes make trills, calls and screeches.