Billina is a fictional character in the classic children's series of Oz books by American author L. Frank Baum.

[1] In Ozma of Oz, Billina becomes Dorothy Gale's animal companion after she and the girl are on a small ship and are thrown overboard.

Dorothy was traveling on an ocean voyage to Australia with her Uncle Henry when a violent storm hit, thus tossing the ship over the waves.

Gender confusion reappears, however, and the proud mother discovers that some of those chicks will be "horrid roosters"; she changes the males' names to Daniel.

When Princess Ozma is crowned, upon being freed from the mirror by Dorothy, Billina elects to remain in the Land of Oz.