People frequently get the word Cockatoo and cockatiel confused and these are completely different birds, cockatoos are big birds they can be white they can be salmon colored. They are very large powdery looking birds. They live a long time and are very social cuddly birds they're very attractive cockatiels are wonderful in their own right, they're yellow and white and gray and they come in different patterns and you love cocktails. 
There is quite a difference between them and cockatoos the biggest difference is going to be size. The big black palm cockatoos are exceptionally large they're also a lot louder honking twos are much louder they talk more. Cockatiels can be a little bit quieter, their voices are a little more just squeaky and birdie and maybe only the owners actually know what they're saying very large differences other than the fact that they both have crests absolutely they're both wonderful birds in their own. Cockatoos are wonderful they're very socially needy they need to be out with their owners several hours a day. Cockatiels are maybe not quite as socially needy they can occupy themselves in their cages a little longer, certainly, they need care and attention but cockatiels and cockatoos are very different types of birds so before you were not getting one make sure you know the difference between a cockatiel and a cockatoo.