Wrightwood beat me to it. But I want to add that the part about about fowl anyway:
Fauna are animals, especially the animals of a particular region or period, considered as a group, for example, the fauna of Wrightwood.
A bird is an animal. A fowl is a particular sort of bird either 1) in the order Galliformes such as a chicken or quail or 2) a bird, such as the duck, goose, turkey, or pheasant, that is used as food or hunted as game.