A Cockatiel can live 15 - 20 years, with the proper care and diet. The adult Cockatiel is 10 - 13 inches in legnth from the top of the crest to the tip of the tail.
Cockatiels are naturally sweet tempered and friendly.
The cage for a Cockatiel should be roomy, no smaller than 18w x 18d. Can be kept in pairs and remain tame.