XX-Large Aviator Bird Harness for birds weighing 1600+ grams: Extra Large Hyacinth and Green Wing Macaws (Mostly Males), Chickens, Geese, Pheasants..Escape-Proof! With other brands of harnesses, your bird can easily remove the leash and harness. The strong steel slides have been powder-coated black to make them unattractive as toys..Self-adjusting leash: Automatically adjusts from the chest to the back as the bird climbs and flies. Fewer pressure contact points on bird..Easiest to install - one piece desig...