George and Sonja Conner share information to explain all the varieties in peafowl in a modern context. The two main peafowl origins are derived from the green peafowl (Pavo muticus) and the India blue peafowl (Pavo cristatus). While there are many phenotypes today, all of the known color and pattern mutations have been from Pavo cristatus which include cross breeding with green peafowl.
Source: Backyard Poultry, September 2021. Link. Indian blue peafowl are native to Sri Lanka and India while green peafowl are native to southeast Asia.