Cockatoos are parrots. What distinguishes them from other parrots is their crest, which they can move and which they use to show emotions. And they have gall bladder, unlike other parrots. And they are endemic to the island of the South Pacific, whereas most other parrots are endemic to South and Central America.
The word ‘parakeet’ is a general name for small parrots such as budgerigars and cockatiels.
I photographed this cockatoo with a Nikon D500 with a 70-300mm lens at 200mm f6.3 1/640 second and ISO 1600. And what I learned from this shot (a lesson I keep having to learn) is to get enough light on the subject. Underexposure kills the quality of the image. But not with this shot. Click the image to see a larger version and how sharp it is.
Photograph Works 
Interesting info about cockatoos, David. With reference to your comment that they are endemic to the South Pacific, I wonder about Australia? I seem to remember seeing them there flying about, but my memory could definitely be wrong there as I was in Australia in the late 1990s.
Question: Is this the ‘character’ we ‘met’ at that terrific, huge aviary with birds from all over the world when we were in South Africa? The guy /gal who stood guard at the entrance, with a couple of similar crazy mates perching next to him/her? Eh?? Or some other bird entirely?
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It is indeed the little so-and-so 🙂
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