Animal Sounds Library (http://swbg-animals.com/animal-info/sound-library/index.htm)
Guide to Animal Sounds on the Net (http://members.tripod.com/Thryomanes/AnimalSounds.html)
Lion, Panther and Cheetah (and other) Sound Effects (http://www.partnersinrhyme.com/soundfx/animals/BigCats.shtml)