Natural History
At least three endemic species were exterminated when the cave was inundated in 1967 – the crustacean Caecidotea nickajackensis, the pseudoscorpion Microcreagris nickajackensis and the ground beetle Pseudanophthalmus nickajackensis.
Today, Nickajack Cave is a Wildlife Refuge, operated by the Tennessee Wildlife Resources Agency. The cave is home to a bat colony that is estimated to number over 100,000 bats. The cave is a maternity roost where pregnant female gray bats come each spring to give birth and raise their young. There is an observation deck adjacent to the mouth, where visitors can watch the bats leave at dusk to go feed.
Read more about this topic: Nickajack Cave
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