The red junglefowl (Gallus gallus) is a tropical bird in the family Phasianidae. It ranges across much of Southeast Asia and parts of South Asia. It was formerly known as the Bankiva or Bankiva Fowl. It is the species that gave rise to the chicken (Gallus gallus domesticus); the grey junglefowl, Sri Lankan junglefowl and green junglefowl have also contributed genetic material to the gene pool of the chicken.

Evidence from the molecular level derived from whole-genome sequencing revealed that the chicken was domesticated from red junglefowl about 8,000 years ago, with this domestication event involving multiple maternal origins. Since then, their domestic form has spread around the world where they are kept by humans for their meat, eggs, and companionship.