just a side note for you, your mandarin duckling is a drake too.
Very nice set up though reminds me a lot of my old waterfowl aviaries. Have to agree though, watch those males, differnt species will be fine, but all your ruffed pheasants will likely fight at times, as will the longtails, longtails and ruffs usually are fine with each other. Just curious what's your plan when you mix breed these guys though??