Bagheera is a fictional character in Rudyard Kipling's Mowgli stories in the Jungle Book (coll. 1894) and the Second Jungle Book (coll. 1895). He is a black panther (melanistic Indian leopard) who serves as friend, protector and mentor to the "man-cub" Mowgli. The word bagheera is Hindi/Urdu for black panther-- although the root word bagh means tiger.

Born in captivity in the menagerie of the Raja of Udaipur, Rajasthan, India, Bagheera begins to plan for his freedom after his mother dies. Once he is mature and strong enough, he breaks the lock on his cage and escapes into the jungle, where his ferocity and cunning nature win him the respect of all its other inhabitants, except for the very incredibly conceited Shere Khan The Tiger.

Bagheera reveals all this to Mowgli later. None but Mowgli ever learn that Bagheera once wore a collar and chain, explaining the cat's special insight concerning men. Bagheera's brief description of his imprisonment and escape is this, “I had never seen the jungle. They fed me behind bars from an iron pan till one night I felt that I was Bagheera - the Panther - and no man's plaything, and I broke the silly lock with one blow of my paw and came away; and because I had learned the ways of men, I became more terrible in the jungle than Shere Khan.” Because he had learned the ways of men, he was also more loving to the abandoned human child who came to be under his care and protection.

More Info: en.wikipedia.org