An Eastern Cattle Egret searches for cockroaches as an adult Malaysian Great Argus engages a subadult " Blue Shouldered Bengal" peacock ( peafowl descended of two hybrid parents). Many people don't realise that the Great Argus is a kind of peafowl and that these two seemingly very different birds are each others closest living relatives. Peafowl, including Argus require certain levels of specific amino acids and antioxidants in their diets to produce their impressive plumage and live long, productive lives. Some peafowl, like the Great Argus, fail in captivity largely because of inadequate nutrition. Their mortality far exceeds their reproductive success in most collections.