Why do birds sing? August 5, 2020March 3, 2012 by Pamela Landy In most species of songbirds, only male birds sing, and for only two reasons: to protect territory and to attract a mate. Related Answers Do birds sing only in trees? How fast can birds fly? Who wrote the short story on which Alfred Hitch-cock’s The Birds (1963) is based? What song did Tom Hanks sing to his mother (Mercedes Ruehl) as proof her son was alive in Big (1988)? In what movie did Doris Day first sing, “Que Sera, Sera”? In what film did Judy Garland sing “Dear Mr. Gable, You Made Me Love You”?