n.
Crested, small, gray Australian parrot ( Nymphicus hollandicus ).
It has a yellow head, red ear patches, and a heavy beak used to crack nuts. The cockatiel is in the same subfamily (Cacatuinae) as the larger cockatoo . About 13 in. (32 cm) long, the cockatiel lives in open areas and eats grass seeds. One of the most common pet parrots, it is bred in many colour variations.