This list of mythical creatures that begin with this letter and I am constantly gathering information from each continent, and is continually being updated.
Xiao (mythology) (Chinese)
In Chinese mythology, the xiao is the name of several creatures, including the xiao "a long-armed ape" or "a four-winged bird" and shanxiao "mischievous, one-legged mountain spirit". Furthermore, some Western sources misspell and misconstrue the older romanization hsiao as "hsigo" "a flying monkey". The Flying Monkey is a creature with origins in Chinese mythology, legend and folklore. It would later go on to gain connections to North American fiction; in particular, the classic modern novel The Wonderful Wizard of Oz