>>20802118i think its the feathers, and the way they go about hunting. it's completely unlike any other lifeform. obviously, nothing else can fly like they can, a wasp can't exactly swoop in and grab a target with the bee's knees. there's not very much else on Earth that even resembles birds.
it's a totally unique being. I bet people from other worlds would think birds are about the most alien daily life animal we have.