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https://theanglingrev.com/2019/04/18/welcome-to-the-wonderful-world-of-the-bat-listening-to-bats-at-turls-hill-sedgley-nature-watch-19-8-1191/
Welcome To The Wonderful World Of The Bat - Listening To Bats At Turls Hill, Sedgley. Nature Watch 19/8 (1191)