Wild Kingdom

Wild Kingdom was first broadcast by NBC. The half-hour show aired on Sundays starting January 6, 1963 and continued until 1971, when the program entered syndication.

As a prime-time syndicated program, Wild Kingdom enjoyed great popularity. Although most of the programs aired after 1971 were repeats, new shows continued to be produced until 1988. Perkins was the host for most of the show's history until he was forced to retire in 1985 for health reasons (he would die of cancer the following year). Jim Fowler, Perkins' long-time assistant and sidekick, then became the host.
From: Wikipedia.org