The Yellow-tailed Black Cockatoo is the largest species of cockatoo, reaching 65 cm length (5 cm more than the Goliath).
It has a short crest and long tail and comes from east/southeast Australia.
Males (above right) have a dark beak and pink eye-rings; females (above left) and juveniles have a light beak and grey eye-rings.
Females have less extensive but brighter yellow cheeks.
Cracking an almond nut takes time and skill
Held with tongue and "hand" leaves beak free to work on shell
She changes "hand" (most parrots are left-footed)
Still held firmly with tongue and "hand" while beak digs in
Success at last - she breaks the shell open
and prises out the nut
Female (light beak and dark eye-ring, also brighter yellow cheek)
Male (dark beak and light eye-ring)