Erosion Bird, also known as Opium Bird, is the name given to an AI-generated picture of a large bird-like creature that is depicted on a snow-covered mountain. The bird, being larger than humans, became popularized on TikTok in September 2023 as users on the platform created more artificial intelligence art featuring it. Users began calling it Opium Bird in reference to the record label Opium because its fur coat resembled the fashion aesthetic of rappers signed to the label. Many of the videos featuring Erosion Bird used the caption Calm Luh Fit.

There is no scientific evidence of these Erosion Opium Birds existing, and it appears as though the photos are AI-generated and not in fact real. The photos led viewers to believe that this is documentation of the first contact with these birds by scientists, but some people think these birds are real and dangerous. However, this has reportedly been debunked.

In summary, Erosion Bird is not a real bird or animal, but rather an AI-generated picture that became popular on TikTok.