Fowl birds are one of the most diverse groups of avian species. With hundreds of different kinds, this group encompasses everything from small perching birds to large flightless varieties. In this article, we’ll discuss the various types of fowl birds and how they differ from each other. The term ‘fowl’ is used to refer to several distinct families within the order Galliformes, which includes chickens, turkeys, grouse, pheasants and quail. These birds share many physical ... The term covers a range of birds, from Muscovy and mallard ducks to turkeys, guinea fowl, geese, quail, pigeons, ostriches and pheasants. But it is the chicken which is the greatest in number, being the world’s most populous bird. Chickens form social structures, known as ‘pecking orders’. Fowl are birds belonging to one of two biological orders, namely the gamefowl or landfowl (Galliformes) and the waterfowl (Anseriformes). Bird vs. Fowl What's the Difference? Birds and fowls are both types of avian creatures, but there are some key differences between the two. Birds are a more general term that encompasses a wide variety of species, including songbirds, raptors, and waterfowl.