Wildlife photographer Ian Redmond filmed the interior of the remote Kitum Cave in western Kenya, home to many creatures including thousands of bats.
Redmond commented after filming in February 2018: "Having spent a cumulative total of 6 months (over several years) living in #KitumCave, studying the famous troglodyte tuskers of Mount Elgon, #Kenya, I am very comfortable around bats."
"What makes these caves extraordinary is that the major force of erosion that created them is elephants, tusking and eating the mineral-rich cave walls.
"The cave floor is carpeted in places with elephant dung, so flies and moths must occasionally find themselves in these crystal palaces."
