Pettin’ In The Park was released on 27 January 1934 by Warner Bros.

Warner Bros.

Warner Bros. Entertainment, Inc., also known as Warner Bros. Pictures or simply Warner Bros. , is an American producer of film and television entertainment.One of the major film studios, it is a subsidiary of Time Warner, with its headquarters in Burbank,...

 Studio. It was directed by Bernard Brown and animated by Jack King

Jack King (animator)

James Patton "Jack" King was an American comics artist and animator best known for his work at Walt Disney Productions.Born in Alabama, King began his animation career in the silent era in 1920 working at Bray Productions animation studio...

 and Bob Clampett

Bob Clampett

Robert Emerson "Bob" Clampett was an American animator, producer, director, and puppeteer best known for his work on the Looney Tunes animated series from Warner Bros., and the television shows Time for Beany and Beany and Cecil...

 (1913–1984). The musical score was by Norman Spencer. It was a Merrie Melodies

Merrie Melodies

Merrie Melodies is the name of a series of animated cartoons distributed by Warner Bros. Pictures between 1931 and 1969.Originally produced by Harman-Ising Pictures, Merrie Melodies were produced by Leon Schlesinger Productions from 1933 to 1944. Schlesinger sold his studio to Warner Bros. in 1944,...

 cartoon

Cartoon

A cartoon is a form of two-dimensional illustrated visual art. While the specific definition has changed over time, modern usage refers to a typically non-realistic or semi-realistic drawing or painting intended for satire, caricature, or humor, or to the artistic style of such works...

.

The source of the song which begins the cartoon

Cartoon

A cartoon is a form of two-dimensional illustrated visual art. While the specific definition has changed over time, modern usage refers to a typically non-realistic or semi-realistic drawing or painting intended for satire, caricature, or humor, or to the artistic style of such works...

 is a Busby Berkeley

Busby Berkeley

Busby Berkeley was a highly influential Hollywood movie director and musical choreographer. Berkeley was famous for his elaborate musical production numbers that often involved complex geometric patterns...

 movie called Gold Diggers of 1933

Gold Diggers of 1933

Gold Diggers of 1933 is a pre-code Warner Bros. musical film directed by Mervyn LeRoy with songs by Harry Warren and Al Dubin , staged and choreographed by Busby Berkeley...

. The first part of the cartoon has to do with the song itself, and someone loving another person of the opposite gender. The second part has to do with different birds in a swimming contest in the public park pond.