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.
Book Series In Order Â» Authors Â» Nora Roberts. The 17th book in the Joe Pickett series of books by the amazing author C.J. Box comes out soon and is our book of the month. If you've never read the Pickett series you're missing out on an AMAZING book series. Read more about the Joe Pickett series.