When Leo was less than seven weeks old, he became orphaned and left alone in the snowy mountains of Pakistan. Luckily, a shepherd rescued him, but Leo was too big to be taken care of for long. It wasn't clear what would happen to Leo because without a mother, he would be unable to survive in the wild on his own. Then, in August 2006, three scientists from the Wildlife Conservation Society began their journey high into the Himilayas to rescue him. Leo was flown to New York, where he made his home at the Bronx Zoo.