They are very fast runners when fleeing from predators in-spite of the fact that they have short legs. Many gallinaceous birds, running rather than flying, are expert runners and avoid predators. Males are more elegant than females. Males often have elaborate bonding behavior patterns that include prancing, tail or head feathers fluffing, and vocal sounds.
Gallinaceous birds are land or aquatic animals; most prefer not to travel and to walk and run for navigation either. They survive in the wild for 5–8 years and in cages for up to 30 years. They can be identified in a range of habitats worldwide, including forests, deserts, and grasslands. For communication, courtship, combat, tribalism, and brooding, they use visual displays and vocalizations.
They have different techniques for mating; some are monogamous, while others are polygamous. Male bonding activity consists of intricate optical plumage displays. In compliance with the environment, they breed seasonally and lay 3 to 16 eggs per year in habitats established on the land or in woods.
Gallinaceous birds rely on a variety of natural materials that may include fruits, vegetables, leaves, shoots, bulbs, rhizomes, stems, insects, shrimps, spiders, centipedes, reptiles, small rodents, and shells.
The size of such birds ranges from the diminutive king quail (Coturnix Chinensis) (5 in.) tall and weighing 28–40 g (1–1,4 oz) to the largest existing galliform population, the North American wild turkey (Meleagris gallopavo), that can weigh approximately to 14 kg (30,5 lb) and surpass 120 cm (47 in) height.
Green peafowl (Pavo muticus) is most undoubtedly the galliform species of birds with the longest wingspan and the maximum overall length (including a train of more than 6 feet). Most species of the genus of galliforms are chubby-bodied with broad necks and slightly longer legs and small and very low wings. Pheasants, grouse, francolins, and pertussis are indicative of their outwardly corpulent silhouettes.
Adult males of several galliform birds have at the back of each leg one to many long horny spurs that they use to strike. There is pronounced sexual dimorphism in several lines, and the more apomorphic ("advanced") lineages appear to become more sexually dimorphic amongst any galliform genus.