vampire bat physiology : due to being a nocturnal species who generally hunt at night , vampire bats like other vampires have exellent night vision , blood sucking as a type of vampire , her digestive system is underdeveloped and can only digest liquids . she therefore has to drink blood for nourishment , weakness as a vampire bat she most likely has the same weakness as other vampires, mean pirati is sensitive to sunlight and uv light, ind is allergic to garlic and silver . can fly