King Kong's bellow was supposedly a mix of tiger growl and lion roar played backwards, the Rancor in Return of the Jedi was a slowed-down chihuahua, and Chewbacca was a stew of badger, bear, and walrus. Mix together at least three sounds (animal or otherwise) to create the shriek/roar/yawp or indecipherable language of a made-up monster/species. Consider slowing the sounds down or playing them backwards. Post MP3 below.
You’ll Never Guess How the Dinosaur Sounds in Jurassic Park Were Made! Click link to find out!