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Volunteer cavers helping build a huge steel gate to protect endangered gray bats that hibernate in Hubbards Cave, Tennessee. Due to protection, this colony grew by over 400,000 over several decades. Conservation
Hubbard's CaveMerlin TuttleMerlin Tuttle's Bat ConservationNature ConservancyNorth AmericaSmugMugTennesseeTennessee National GuardThe Nature ConservancyU.S.building gatecave entrancecave gatingcavercaver volunteersconservationfavorites box 000field work