In the 1980’s Barn Owls were declared extinct in Avon. While they were seen flying through the county, they weren’t breeding there and no one was quite sure why. But due to one local hawk specialist, some hefty detective work and the generosity of the Portbury Docks authority, barn owls are now back and fledging in our area. Josie D’Arby uncovers this and other endangered animal stories for the BBC as regional input for Saving Planet Earth. Also featuring dormice in Cheddar Gorge and greater horseshoe bats at Woodchester Mansion.