Cockatoos are very intelligent and playful. Several years ago I heard one squawking away in a big gum tree I had out the front, so I went out to have a look. Cocky was perched on a branch, snipping twigs off and dropping them on a koala resting on the branch immediately below. Each time he scored a hit the koala would reach out to try and grab the bird who then spread his wings and squawked.

They quit this after a while so I went back inside. Later I checked to see if they were still there just in time to see Cocky walk down his branch, down the tree trunk and out along the koala's branch. Koala was now asleep. Cocky went right up beside him then squawked right in koala's ear. Koala shot bolt upright, eyes wide, ears and arms flapping. Don't tell me birds don't have a sense of humour!