Based on the search results, it seems that Opium Bird is a term used to refer to a collection of bird-like creatures created through artificial intelligence and set against a backdrop of rugged, snow-covered mountains. The creatures are also referred to as Erosion Birds. The term Opium Bird seems to have originated from a viral meme that featured images of a Bigfoot-like creature called the Opium Bird. However, it is important to note that there is no scientific evidence of the existence of Opium Birds. The term Opium Bird has also been used to refer to a ceramic bird feeder and a fashion meme.