S3E29 This week Steve joins Martyn Cooke outside a holiday cottage in Staffordshire as they set up a matrix of bat detectors to record the sound of Brandt's bats emerging from their roost before flying into the adjacent woodland. Martyn explains why he is recording the calls, why he's travelled all the way from Surrey to record these bats and what the calls will be used for. Steve finds out how an injured serotine bat got Martyn hooked on bats and they talk about the advances in automatic bat call identification.

If you're interested in finding out more about bat detectors, your local bat group are likely to be able to lend you a detector and you can learn more about them on our website here.   Listen to our earlier episode from series one about Brandt's in the Churnet valley here.

• Follow Martyn on twitter
• Borrow detectors from us to help us grow the call library
• Bat Detector Info
• Low cost AudioMoth detectors on twitter

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Producer: Steve Roe @SteveRoeBatMan

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