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Which wild bird was the main ancestor of domestic chickens?

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A peacock stands with its vibrant green and blue tail feathers fully fanned out in display, showing eye-like patterns across the plumage. — Galliform Blue, or Indian, peacock (*Pavo cristatus*) displaying its resplendent feathers.

The primary ancestor of the domestic chicken (Gallus gallus) is the wild red jungle fowl (Gallus gallus), a member of the order Galliformes and the family Phasianidae.12

While the red jungle fowl is considered the main ancestor, evidence suggests that other species within the genus Gallus, such as the gray jungle fowl (G. sonneratii) of southern India, may have also contributed to the ancestry of modern domestic breeds.12