Question

Why do some birds not fly?

Answer 1

Some birds cannot fly because their flat breastbones lack the keel that anchors the strong pectoral muscles required for flight..

Answer 2

Answer:Answer: color= "blue">[/tex]Hey mate answer of your question is given below by me

Explanation:...

Unlike most birds, their flat breastbones lack the keel that anchors the strong pectoral muscles required for flight. Their puny wings can't possibly lift their heavy bodies off the ground. These flightless birds, called ratites, are clearly different from other avian species.

I hope it can help you...