Did you know that cockatoos are some of the longest living parrots and there are 18 different cockatoo species? This long living bird breed needs to have a large cockatoo cage to ensure a happy and healthy life. The minimum cage size for a cockatoo is 36"x48"x48" and bar spacing should be between 1" and 1.5". Make sure your cockatoo gets plenty of play time and has at least a couple of perches. Cockatoo cages should also have horizontal bars for climbing.