Question

to add of aerial habit which changes takes place in Bird

Answer 1

Flight feathers — specifically shaped feathers that provide lift and reduce drag.

A huge keelbone for anchoring flight muscles.

Fused fingerbones creating a strong anchor for flight feathers, and longer, strong front limbs.

Pretty much everything else (including hollow bones and a wishbone) evolved prior to any flying or gliding, for other reasons, so don’t represent a significant change to adapt to flight.

Feathered, hollow-boned dinosaur. Long feathers on its hands are not flight feathers, although they have a similar appearance. It’s easy to see why only a few more changes were needed to allow gliding, and then powered flight. This is NOT the ancestor of avialae, but a different branch of dinosaurs with a similar form to that ancestor. This is a dromaeosaur— known popularly today as a raptor. :)

Answer 2

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