Nope's depiction of a UFO felt really unique

Depicting it as a wild, possibly extraterrestrial (?) animal felt really unique - a simple but very original idea. Not sure I've seen that before. We've seen extraterrestrials depicted but they hugely come in a ship, they're not the ship themselves. Has this idea been done (much) on films before Nope and if so what are some good examples of this?ETA - I'm now wondering if it was even meant to be extraterrestrial? I just assumed it was, but maybe it was supposed to be a previously unknown creature that was a product of Earth? via /r/movies https://ift.tt/S56W7Gw