Color mutation: Fifteen different Cockatiel colour mutations are currently established in aviculture, including Grey, Pied, Pearled, Cinnamon, Whitefaced, Lutino, Albino (aka. Whitefaced Lutino) and Yellowcheeked Cockatiels. There are many mutations of Cockatiels with varied colors, they are: Silvestre, Harlequin, Lutino, Cinnamon, opaline (Pearl), Cara Black, Silver, Fawn, Albino (there is a pattern and not just albino genetic mutations), Pastel, Silver and Recessive silver dominant. At 300 mm to 330 mm (12 to 13 inches), the cockatiel is the smallest and only parakeet type of Cackatoo species. The latter ranaging between 300 mm to 600 mm (12-24 inches) in length.
Lifespan: The Cockatiel's lifespan in captivity is generally given as 15–20 years, though it is sometimes given as short as 10–15 years, and there are reports of Cockatiels living as long as 32 years, the oldest confirmed specimen reported being 36 years old. Diet and exercise are major determining factors in cockatiel lifespan.