Jungle Jitters (1938)

Jungle Jitters is a one-reel animated cartoon short subject in the Merrie Melodies series, produced in Technicolor and released to theatres on February 19, 1938 by Warner Bros. Pictures and The Vitaphone Corporation. It was produced by Leon Schlesinger and directed by Friz Freleng, with musical supervision by Carl W. Stalling and voices by Mel Blanc.

More at Wikipedia.