Where is the Cacatua sulphurea from. I would have said that was a Sulphur-crested Cockatoo (Cacatua galerita) from Australia.
Lesser's are from Indonesia - Sulawesi and the Lesser Sundas. But I would have said Greater Sulphur-Crested too - the Lesser usually has a large bright yellow spot over the ear and cheek.
I think its a lesser sulphur-crest. You can see the yellow ear-patch faintly, but also the beak on lessers always looks a little too big for the bird.