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Vampire Bat Guano is a Black Semi-liquid

Credit: John Pint
article: Vampire Bats in Mexican Caves 		Other images from this article
Portrait of a Vampire Bat, Desmodus Rotundus Vampire Bat Guano is a Black Semi-liquid Collecting Vampires in Chapuzon Cave, Mexico Mexican Cave Entrance Sealed with Chicken Wire Beneficial Bats are Disappearing in Mexico
Vampire Bat Guano is a Black Semi-liquid, John Pint