If you happen to own some large exotic birds, you likely know that they should have enough room to spread their winds. Therefore, you should offer them an environment that goes beyond what a traditional style parrot cage can offer. How about an aviary? That will give your bird plenty of room to move around, play and possible even fly a short distance. If you care about the happiness of your birds, and you want to provide them with the best living situation they can have in your care, then you should consider buying or building something other than just an adequate space in which they can live.