That's peculiar

According to The Owl Pages, the call of the Elf Owl (Micrathene whitneyi) sounds like “Greg Clarke”. And it’s copyrighted, too. It seems like owls are a more advanced species than I would have thought.

Also: “When danger approaches, an Elf Owl straightens its body, covers its lighter underparts with one wing, then turns its head and peers over the bent wing with the top of its eyes.”