We received an interesting and highly specific question from a reader about ephydrid fly (shore fly) larvae, which are a type of maggot that live in natural hot springs. She wants to know if it is safe to sit in a hot springs that is “filled with ephyrdid fly maggots.” Psychologically, she doesn’t mind the presence of the larvae, and she is keen to enjoy the natural hot springs she comes across in nature, but she doesn’t want the larvae to “crawl up places they don’t belong.” She spells out this concern in more graphic detail, citing specific orifices, including a wound on her foot, and we’ll leave it to you to imagine some of the other openings she is concerned with. Are the maggots that live in hot springs dangerous, and will they crawl into places they don’t belong?