Olympus is an owl from Harry Potter. One of the owls, actually. She is a eurasian eagle owl that delights the audience at the Animal Actors stage inside Universal Studio in Los Angeles, California.
Be sure to catch the Animal Actors show when you tour Universal Studios. They’ve got dogs, rats, pigs, owls, birds, cats, etc. They are very, very entertaining.
Aside from Olympus, you can also see other animal who acted in movies, like Sparky from Bruce Almighty; Dusty from Grinch and the Beagle Alex from We Bought a Zoo and I am Number 4.