In 2002, a Chinese blue magpie, whose native range is in the Western Himalayas, Vietnam, Cambodia and Myanmar, was spotted in Wuling Farm in Heping Township, Taichung County. It is believed to have escaped from a private enclosure. By 2006, 10 individuals were spotted in the vicinity.
Some scientists were concerned that this species might threaten the survival of the native Taiwan blue magpie. The two species were believed to be from the same family that branched off several million years ago. Now they have slight differences: the red-billed blue magpie has red eyes, a white neck and chest, while the blue magpie has yellow eyes, a black neck and blue chest.
When it was discovered that the two species were interbreeding, scientists were worried that this would further threaten the survival of the native blue magpie and contaminate its unique genes. In 2007, a removal plan of the Chinese blue magpie was launched and the population of the invasive species was successfully controlled.