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Phasianinae is a subfamily of pheasants in the Phasianidae family. The subfamily includes pheasants, tragopans, junglefowl, peafowl, and other similar birds. Although this subfamily was considered monophyletic and separated from the partridges, francolins, and Old World quails (Perdicinae) till the early 1990', molecular phylogenies have shown that this two subfamilies actually constitute only one lineage. For example, some partridges (Perdix genus) are more closely affiliated to pheasants, whereas Old World quails and partridges from the Alectoris genus are closer to junglefowls.

Phasianinae are characterised by strong sexual dimorphism, males being highly ornate with bright colors and adornments such as wattles and long tails. Males are usually larger than females and have longer tails. Males play no part in rearing the young. They typically eat seeds and some insects.

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