The red junglefowl ('Gallus gallus') is a tropical bird in the family 'Phasianidae'. It is the primary progenitor of the domestic chicken ('Gallus gallus domesticus') (though genetic evidence strongly suggests some past hybridisation with the grey junglefowl, as well).

The red junglefowl was first domesticated at least 5,000 years ago in India. Since then, its domestic form has spread around the world and is kept globally as a very productive food source of both meat and eggs.

More Info: en.wikipedia.org