“It’s a mating tortoise!
It sounded like a joke, because tortoises mating can take a long time.
You’ve got to have plenty of time to sit around and watch and record them.”
Various other raptor noises in the movie were in fact recordings of horses breathing and annoyed geese.
“The bark that (the velociraptor) makes.
When it comes in the kitchen and it barks.
That’s the sound of a tortoise that is mating,“Rydstrom told SF Gate.
“The male tortoise would go up, and then fall off, and then go back again.
It’s riding on the back of the female tortoise.
So it’s climbing up her shell basically, and then it falls off.
It’s a little sexual.”