Keith French has over 10 years' experience with bat related work, and is a licensed bat worker, both living and working within Epping Forest (Essex), where he is employed by the City of London as 'Head Forest Keeper'. Having a driven associate like Andrew Froud has helped fuel his enthusiasm to delve deeper into this complex and relatively un-researched subject. After recording their first Nathusius' pipistrelle lekking in an ancient oak pollard, the search was on to record social calls from other species, especially Noctule and Myotis. Keith has also been keen to pass on the knowledge he has gained by giving guided walks, presentations and allowing volunteers the chance to improve their skills. He is well travelled, having been fortunate enough to observe and record bats in some exotic locations such as the Amazon, Croatia, Costa Rica, USA and several African countries.