It has wings but no breast bone to anchor the large flight muscles. It is a large bird which feeds mostly at night and was once thought to be an owl. No parrots are territorial, though they will defend their nests. Ten species of parrot have gone extinct since mankind started keeping specimens in museums. These include the unique Kakapo and several species of Macaw.
Pygmy parrots are unique in feeding on slime like fungi and algae.
Palm Cockatoos can crack brazil nuts in their bills. The Kea, which is accused of eating sheep's wool and even of attacking and killing sheep is not really guilty of these crimes. Recent scientific evidence suggests that they are in fact feeding on blowfly larvae living in the sheep's wool. Quaker Parakeets, Myopsitta monarchus , also build a communal nest of twigs in the open in S. America. Love birds such as Agapornis psittacula show remarkable fidelity and once a pair has formed they are renowned for their faithfulness to each other.