Gallus gallus can live up to ten years. The molting process, taking the old feathers and putting new ones on, for an adult, takes about three to four months every year. The memory of the red junglefowl is very short. (North and Bell 1990)

Domestic chickens, Gallus gallus domesticus, are believed to have originated from a continental population of Gallus gallus gallus. (Fumihito et al., 1996)