The Night Sparrow (夜雀, yasuzume) is a folk legend in western Japan. According to legend, if you're out at midnight, the night sparrow will follow you while singing "Chin Chin." The appearance of a night sparrow is a prodigious sign that you will meet a wolf/stray dog soon. Legend also has it that if you catch the night sparrow, you'll suffer from severe night-blindness.
- Example: Mystia Lorelei