The Galliformes is an order of birds containing the turkeys, grouse, quails and pheasants. About 256 species are found worldwide.

These birds vary in size from the diminutive Asian Rain Quails (Excalfactoria chinensis) at 12.5 cm long and weighing 28 to 40 g to the largest extant Galliform species, is the North American Wild Turkey (Meleagris gallopavo), wild specimens of which may weigh up to 11 kilograms (about 24 pounds).

The Galliform bird species with the largest wing-span is most likely the Green Peafowl (Pavo muticus). Most Galliform genera are large in body with thick necks and moderately long legs and with rounded wings. Grouse, pheasants, francolins and partridges are typical in their outwardly corpulent silhouettes.

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