Keel (bird anatomy) Keel (bird anatomy) A keel or carina (plural carinae) in bird anatomy is an extension of the sternum (breastbone) which runs axially along the midline of the sternum and extends outward, perpendicular to the plane of the ribs. The keel provides an anchor to which a bird's wing muscles attach, thereby providing adequate leverage for flight. Keels do not exist on all birds; in particular, some flightless birds lack a keel structure. Historically, the presence or absence of a pronounced keel structure was used as a broad classification of birds into two orders: Carinatae (from "carina", "keel"), having a pronounced
Anatomy of a Murder him in the film/ His character was Pie-Eye". Wins Nominations Academy Awards: British Academy Film Awards: Directors Guild of America Awards: Golden Globe Awards: "Anatomy of a Murder" was one of 25 films added to the National Film Registry in 2012. "The annual selections by the Library of Congress span more than a century of American filmmaking." Anatomy of a Murder Anatomy of a Murder is a 1959 American courtroom drama crime film produced and directed by Otto Preminger. The screenplay by Wendell Mayes was based on the novel of the same name written by Michigan Supreme Court Justice John