Eerie things start to pop up around Halloween — black cats prowling in the night, ghost sightings, and bats glowing bright green. And while the last one might seem like something only found in a ...

Six species of North American bats—big brown bats (pictured), eastern red bats, Seminole bats, southeastern myotis, gray bats and Brazilian free-tailed bats—glow green under ultraviolet light, new ...