A remarkable journey into the secret world of one of the most endangered and least understood animals on earth – bats. With cutting-edge night-vision cameras and ultrasonic detectors, this programme follows a greater horseshoe bat roost for four months during the summer of 2019, capturing the hidden life of the colony as never before. Witness the birth of a new generation of pups and follow their progress towards their perilous maiden flight outside the roost.

Originally released by BBC Worldwide Learning, 2020. Streaming video file encoded with permission for digital streaming by Infobase on April 30, 2021.