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The grey junglefowl (Gallus sonneratii), also known as Sonnerat's junglefowl, is one of the wild ancestors of domestic fowl together with the red junglefowl and other junglefowls.

A gene from the grey junglefowl is responsible for the yellow pigment in the legs and different body parts of all the domesticated chicken.[2] A more recent study revealed multiple grey junglefowl genomic regions introgressed the genome of domestic chicken with evidence of some domestic chicken genes also found in the grey junglefowl.domestic fowl together with the red junglefowl and other junglefowls.

A gene from the grey junglefowl is responsible for the yellow pigment in the legs and different body parts of all the domesticated chicken.[2] A more recent study revealed multiple grey junglefowl genomic regions introgressed the genome of domestic chicken with evidence of some domestic chicken genes also found in the grey junglefowl.[3]

This species is endemic to India, and even today it is found mainly in peninsular India and towards the northern boundary. It will sometimes hybridize in the wild with the red junglefowl. It also hybridizes readily in captivity and sometimes with free-range domestic fowl kept in habitations close to forests. Both the grey junglefowl and red junglefowl diverged about 2.6 million years ago.[3]

The species epithet commemorates the French explorer Pierre Sonnerat. Local names include Komri in Rajasthan, Geera kur or Parda komri in Gondi, Jangli Murghi in Hindi, Raan kombdi in Marathi, Kattu Kozhi in Tamil and Malayalam, Kaadu koli in Kannada and Tella adavi kodi in Telugu.[4]

Grey Junglefowl cock in Nagarahole Tiger Reserve, India.

The male has a black cape with ochre spots and the

A gene from the grey junglefowl is responsible for the yellow pigment in the legs and different body parts of all the domesticated chicken.[2] A more recent study revealed multiple grey junglefowl genomic regions introgressed the genome of domestic chicken with evidence of some domestic chicken genes also found in the grey junglefowl.[3]

This species is endemic to India, and even today it is found mainly in peninsular India and towards the northern boundary. It will sometimes hybridize in the wild with the red junglefowl. It also hybridizes readily in captivity and sometimes with free-range domestic fowl kept in habitations close to forests. Both the grey junglefowl and red junglefowl diverged about 2.6 million years ago.[3]

The species epithet commemorates the French explorer Pierre Sonnerat. Local names include Komri in Rajasthan, Geera kur or Parda komri in Gondi, Jangli Murghi in Hindi, Raan kombdi in Marathi, Kattu Kozhi in Tamil and Malayalam, Kaadu koli in Kannada and Tella adavi kodi in Telugu.[4]

The male has a black cape with ochre spots and the body plumage on a grey ground colour is finely patterned. The elongated neck feathers are dark and end in a small, hard, yellowish plate; this peculiar structure making them popular for making high-grade artificial flies.[5] The male has red wattles and combs but not as strongly developed as in the red junglefowl. Legs of males are red and have spurs while the yellow legs of females usually lack spurs.[6][7] The central tail feathers are long and sickle shaped. Males have an eclipse plumage in which they moult their colourful neck feathers in summer during or after the breeding season.[8]

The female is duller and has black and white streaking on the underparts and yellow legs.

They are found in thickets, on the forest floor and open scrub. Their loud calls of Ku-kayak-kyuk-kyuk (About this soundCall of male About this soundOther calls About this soundcalls