In large aviary spaces you can keep button quail in with coturnix but since game birds are so aggressive and territorial I really wouldn't recommend keeping different species together. There are no two gamebirds that we can obtain domestically that come from the same region or habitat. What bobwhites need is a world away from japanese quail need since they literally live a world away from each other. Partridges are common in the middle east, most pheasants from China, Japanese quail to Russia and North China, bobwhites to the eastern half of the US....You see what I'm getting at? None of these birds has anything in common so trying to keep them together will leave one species at least with needs unmet.
Pheasants-->Breed in pairs and require appx 50sq ft per bird, cannibalistic tendencies, big enough to kill a quail before you could stop
Partridges-->Aggressive birds, breed in pairs or trios, cannibalistic tendencies, big enough to kill a quail before you could stop it as well.
Button quail-->Can be kept with coturnix in aviary type settings as long there is plenty of space.
Bobwhties--->Cannibalistic tendencies, very aggressive, breed in pairs or trios. Can hybridize with coturnix (process is very violent to the point of being inhumane)
Coturnix-->docile, covey breed (1 roo to 4-7 hens), don't have the instinct to flee danger so they are prime targets for meaner birds.
@Zayn I really don't think you realize how aggressive pheasants and partridges are or can be to suggest keeping them with coturnix quail. For comparisons sake coturnix are peace lovin hippies and pheasants and partridges are war machines.
Also italian is a color phase of Japanese (coturnix) quail. Italians, A&M (texas quail or texas A&M), Pharaoh, Tibetan, Manchurian, etc. are all just color phases of coturnix quail.
