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.
The Story of my life; with her letters (1887-1901) and a supplementary account of her education, including passages from the reports and letters of her teacher, Anne Mansfield Sullivan. by Helen Keller, Annie Sullivan, John Albert Macy. 3.76 of 5 stars 3.76 avg rating â 135 ratings â published 1902 â 15 editions.