These cockatoos (Cacatua goffini) are not native and are one of the many caged birds introduced to Singapore sometimes ago. They have now established themselves in quite a few area in Singapore. You may see them at Changi village, Pasir Ris, Buona Vista, Jurong, etc.
Another popular introduced caged birds is this Red-Breasted Parakeet (Psittacula alexandri). You may find them building nest in many road-side trees on many parts of Singapore! These feral birds have all chosen Singapore to be their new home!
What I'm puzzled was their 'head shaking' behavior. Aren't this is the normal behavior for caged birds when they lost their freedom and will shake their head out of boredom? Why this behavior still shown on feral birds?...
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