This is inside a natural Natterers roost recorded in infra-red, so all behaviour is natural. You will see the first baby, about 2 days old, discovered in this roost in Kent. You can see that it gets knocked about quiet a bit by the adults. The sound is a bat detector tuned to 38kz. The feeding buzzes are from bats feeding outside the roost arch. The clicking sounds are the Natterers special ecolocation clicks only used inside the roost and arch.
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