The series premiered in 1968.

The humorous strip features a group of wild animals living in a jungle called Freeborn. They go quietly about their business and chat a little. The series has a number of recurring characters, of which the most seen are the insecure lion Lyle, the self-centered bird Dodo, and the clueless gnu Gnu.

The title was taken from a 1930 Marx Brothers film by the same name. Nowadays the term is mostly known in the USA for a special animal-shaped type of bisquits (crackers).