Home / Birds I want to start cockatiel. What size of a cage is necessary for them? The cage for one cockatiel should be not less 70�65�60 see. Optimum, if the bird can easily spread wings, not concerning walls of a cage. Also Cockatiel the place is necessary for flight from a pole on a pole to support muscles of wings in a tone. P.S. Given articles have been translated by the automatic translator