Gū Huò Niǎo (姑穫鳥)

A Gū Huò Niǎo (姑穫鳥). A woman who died in childbirth becomes a creature that can change shape between bird and woman. It wants to steal male infants. If you have a newborn son, make sure you don't leave his clothes outside at night, or a Gū Huò Niǎo will find them and mark them with spots of her blood. If you put these clothes on your baby, he will die, and his spirit will go to the Gū Huò Niǎo.