King of the Jungle is an American reality television program, that appears on the Animal Planet cable television network. The original series debuted in Fall 2003 and starred a group of 12 "animal experts" (although only two were Doctors of Veterinary Medicine and one was a biologist) and was hosted by Jeff Corwin. read more
In more recent times, wild animals have become generally referred to as 'jungle animals', as a way of separating them from 'farm animals', say, or pets. Hence, King of the Jungle. read more
Since the tiger is the largest of all cats, and lives primarily in jungles, the title king of the jungle might better be applied to the tiger, whilst king of beasts is used for the lion. Source(s): I used to be a zookeeper and have studied animals all my life. read more