Respiration in birds is much different than in humans and other mammals. These differences are adaptations for flight and for singing. The bird's lung is relatively small in proportion to its body size when compared to that of a mammal; they are only half the size of the mammalian lung.espiration in birds is much different than in humans and other mammals. These differences are adaptations for flight and for singing. The bird's lung is relatively small in proportion to its body size when compared to that of a mammal; they are only half the size of the mammalian lung.
Mary Higgins Clark. Mary Higgins Clark, #1 international and New York Times bestselling author, has written thirty-four suspense novels; three collections of short stories; a historical novel, Mount Vernon Love Story; two childrenâs books, including The Magical Christmas Horse; and a memoir, Kitchen Privileges.
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