Directed by
| Robert Clampett | ... | (supervision) |
Writing Credits
| Dr. Seuss | ... | (book) |
| Michael Maltese | ... | (adaptation) |
| Rich Hogan | ... | (uncredited) |
Cast
| Robert Clampett | ... | Hunter (voice) | |
 |
Frank Graham | ... | Narrator / Hunter (voice) |
|
|
Kent Rogers | ... | Horton / A Friend / Giraffe / Peter Lorre (voice) |
| Sara Berner | ... | Mayzie / Elephant Bird (voice) (uncredited) | |
| Mel Blanc | ... | Animal / Small Hunter / Audience Member (voice) (uncredited) | |
Produced by
| Henry Binder | ... | assistant producer (uncredited) |
| Leon Schlesinger | ... | producer |
Music by
| Carl W. Stalling | ||
Editing by
| Treg Brown | ... | (uncredited) |
Art Department
| Ann Almond | ... | ink and paint (uncredited) |
| Mabel Andes | ... | painter (uncredited) |
| Betty Brenon | ... | assistant ink and paint supervisor (uncredited) |
| Ruth Cavert | ... | painter (uncredited) |
| Raynell Day | ... | inker (uncredited) |
| Florence Finkelhor | ... | inker (uncredited) |
| Frances Garcia | ... | painter (uncredited) |
| Gladys Hallberg | ... | painter (uncredited) |
| Florence Hammontre | ... | inker (uncredited) |
| Frank Powers | ... | ink and paint supervisor (uncredited) |
| Martha Sigall | ... | painter (uncredited) |
| Auril Thompson | ... | painter (uncredited) |
Sound Department
| Treg Brown | ... | sound effects editor (uncredited) |
Visual Effects by
| A.C. Gamer | ... | effects animator (uncredited) |
Camera and Electrical Department
| Ray Bloss | ... | animation camera (uncredited) |
| John W. Burton | ... | animation camera (uncredited) |
| Hank Garner | ... | animation camera (uncredited) |
| Ken Moore | ... | animation camera (uncredited) |
Animation Department
| Robert McKimson | ... | animator |
| Fred Abranz | ... | assistant animator (uncredited) |
| Warren Batchelder | ... | assistant animator (uncredited) |
| Rev Chaney | ... | animator (uncredited) |
| Izzy Ellis | ... | animator (uncredited) |
| Nick Gibson | ... | character designer (uncredited) |
| Earl Klein | ... | layout artist (uncredited) |
| Lou Lilly | ... | assistant animator (uncredited) |
| Thomas McKimson | ... | animator (uncredited) |
| Bill Melendez | ... | assistant animator (uncredited) |
| Phil Monroe | ... | animator (uncredited) |
| Bob North | ... | assistant animator (uncredited) |
| Virgil Ross | ... | animator (uncredited) |
| Michael Sasanoff | ... | background artist (uncredited) |
| Rod Scribner | ... | animator (uncredited) |
| Sidney Sutherland | ... | animator (uncredited) |
| Richard H. Thomas | ... | background artist (uncredited) |
| Cornett Wood | ... | animator (uncredited) |
Music Department
| Carl W. Stalling | ... | musical director |
| Milt Franklyn | ... | orchestrator (uncredited) |
