Birds are feathered, winged, two-legged, warm-blooded, egg-laying vertebrates. They also have a beak,  a four-chambered heart, and a lightweight but strong skeleton.

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The Japanese White Eye

(Zosterops japonica (simplex)) are an East Asian bird that are resident in Hong Kong, a natural part of Hong Kong’s ecology and a common pet. They are sociable birds often joining flocks of other birds. When in their own groups, they have a social hierarchy established through varying physical displays. Both sexes flex, flutter and vibrate their wings, as well as opening their beaks and rapidly snapping them shut. Males establish their dominance based who can shrill the loudest.

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