The Corella is a small white cockatoo common throughout most of Australia.  They are noisy and argumentative and like to intimidate other birds, including their larger relatives the Sulphur-crested Cockatoos.  Physically, they are notable for the ring of bare blue skin surrounding each eye.

This picture gave me a lot of trouble as the initial reference photos I took lacked detail or didn’t show the features I wanted, so I had to use a good deal of guess work and then ended up having to redo the tail and legs of the flying bird anyway.