What are facts about on Cockatiels?

They are very playful birds. Most of them have orange cheeks, except for albino cockatiels. Albino cokcatiels have all white feathers and red eyes. The most common cockatiel is the common grey, which is grey except for its cheeks(orange), wings(the bottom part is white), sometimes heads(if male, yellow-whitish), and the tail(if female, will have yellow stripes across the bottom.