Never Mind the Bears

According to a study published 19 years ago in the Journal of Chemical Ecology and unearthed today by Neurotic Physiology, brown tree snakes (Boiga irregularis) are attracted to human menstrual blood — in the study, the snakes’ flick rates increased when presented with, um, a used tampon, and one snake even attacked and, um … ate one. It’s unknown whether the attractant was menstrual blood, human blood or blood in general, but it’s worth noting that brown tree snakes (the scourge of Guam) will eat just about anything. Via @Laelaps. Photo credit: teejaybee (CC licence).