How did Charlie Parker get his name?

Charlie Parker was born Charles Parker Jr.

Parker was a blazingly fast virtuoso, and he introduced revolutionary harmonic ideas including rapid passing chords, new variants of altered chords, and chord substitutions. His tone ranged from clean and penetrating to sweet and somber. Parker acquired the nickname "Yardbird" early in his career. This, and the shortened form "Bird", continued to be used for the rest of his life, inspiring the titles of a number of Parker compositions, such as "Yardbird Suite", "Ornithology", "Bird Gets the Worm", and "Bird of Paradise".