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Aside from mutliple wild jungle fowl species (and their subspecies) of southeast Asia and the Indian subcontinent, of which two or more are progenitors of the modern domestic, many feral populations of domestic pupolations do exist. The population that caught my eye exist on the Island of Kuai (Hawaii). They were everywhere in social groups that are likely similar to those of red jungle fowl. They roost in trees sometimes miles from any home and all food consumed must be acquired by scratch and seek. Predator pressure is very light. Hawk owls may take some chicks but seems like that would be risky. Birds of that population are extremely variable as a function of the many breeds that went into founding the population. They can not fly very well, I put them to test when no body was looking.
Semi-feral populations of game (fighting) chickens also existed where I grew up in southern Indiana and probably more so further south. They were still associated with agricultural areas and probably benefited from heavy hunting of foxes, coons and the like. Such hunting is greatly reduced and may be part of reason why such semi-feral populations no longer persist where I remember them.
I must add that chickens as we know them do not repressent a distinct species. They are derived in large part from red jungle fowl with which they can and do freely interbreed with. The domestic chicken also likely has more one or more of the other jungel fowls (grey and green) in its background. Domestic chickens to me at this time repressent a composit population that would have a difficult time persisting for any length of time in wild environment without human intervention, especially if a wild jungle fowl is present, as latter would out compete it.