Chewbacca's growls are a mix of different animal stock sounds, eg lion, walrus, bear, tiger. There's a source somewhere which details his vocalizations as a bastardization of how Malamute dogs sound. The Godzilla Roar — Despite being copyrighted by Toho it is a prerequisite for giant monsters, being more high pitched than what you'd expect from something that big.
Even the film , as far-removed as it was from the franchise spirit, simply remixed the old reliable sound with elephant rumblings. Intriguingly, at least originally, this was played by Akira Ifukube wearing a leather glove and dragging his hand along the strings of a bass guitar from body to neck. The remake instead uses a complex mix of other sounds, albeit with the same "notation," so to speak, of varying pitches.
Godzilla's roar has changed in pitch and timbre throughout his life, but the one most people remember is his late 60's-early 70's roar, which is the most high-pitched version.
The Heisei and Millennium series have Godzilla's roar being deeper and more bestial. Anguirus' roar has also become a bit of a stock roar, being heard in the Street Fighter games Fei Long's stage , Super Metroid Draygon's screech , and a few non-Godzilla films.
Another stock roar is commonly used as well. It can also be heard, alongside other " classic " monster roars, at 54 seconds into this video. Also used in Warcraft's RTS games, more specifically, the second installment, as the Dragon's stock roar sound effect, with edited versions Jurassic Park actually came up with the brilliant idea of taking multiple stock sound effects of various animals and mixing them together to create the roars of dinosaurs.
The sounds would be inputted into a keyboard, where the Sound Effects team would "play" for individual scenes. For example , Tyrannosaurus rex 's roar is a baby elephant mixed with a tiger and an alligator, and its breath is a whale's blow. No wonder it had won an Award for Best Sound Mixing! Unfortunately, this would cause many to use these sounds for their own dinosaurs The new Avatar movie uses those exact same Tyrannosaurus and Velociraptor screams for the Thanator, a panther-like creature.
In fact, it and the above Godzilla roar are often completely interchangeable. The shark's bellow in Jaws: The Revenge was a semi-common stock roar in older movies, famously used for Spot the dragon's roar in The Munsters and in the Tom and Jerry short "The Milky Waif" one of it's earliest appearances where Jerry gets so mad at Tom he lets loose the bellow; not heard much today.
The roar also appears in the classic giant insect B-movie The Deadly Mantis , where it may have gained notoriety. Spielberg used this roar in the original Jaws: He also used it in Duel when the tanker truck went off the cliff. The roar for Kraid , as noted below, was also used for the Tyrannosaurus rex in the last section of Walking with Dinosaurs , "Death of a Dynasty", and was one of King Kong's roars in the remake of King Kong.
It was also in Episode 3 of Animal Armageddon. In Supernatural a fluttering sound is often heard before an angel appears or disappears, which is meant to represent the sound of their wings. It was also the roar of the Spider Mastermind albeit slightly higher pitched in Doom We hear this one from the sea monster in the Serpent's Pass from Avatar: The Last Airbender as well.
Starcraft by Blizzard Entertainment has the "Mutalisk Screech". In Silent Hill 3 , the Numb Bodies sound the same as the Resident Evil zombies, and the sound of the Closers' footsteps is the "zombie chewing" sound. Not to mention the several monsters that sound like red-tailed hawks when hit or killed or is it a cat screeching?