An erosion bird is a fictional creature that was created using artificial intelligence. It is depicted as a large bird-like creature that resides on top of mountains and is larger than humans. The erosion bird became popularized on TikTok in September 2023, and many users on the platform created more artificial intelligence art featuring it. The name "erosion bird" was given to the creature after a TikToker named Yujiisthebestmc called the creatures Erosion Birds, which subsequently helped the name stick.