Ken Hall has lived near Bristol from shortly after graduating from its university. He has thoroughly explored the surrounding areas over many years, and has taken part in many nationally- and locally-organised surveys of the birds of the region. These include the BTO's Breeding Bird Atlases, their local offshoots for Somerset and for Avon, and surveys of some of the Somerset Wildlife Trust's reserves on the Mendip Hills. A member of the Bristol Ornithological Club since its foundation, he has served on its Committee for long periods, including having held the post of Chairman, and is also one of the team that compiles the Avon Bird Report. In addition to these more local birding activities, he has travelled widely in the Americas, Africa and Europe, with a particular interest in the birds of Spain and France, and has led privately-organised trips to both countries on several occasions. He is the representative in the UK, on a voluntary basis, for the LPO (Ligue pour la Protection des Oiseaux), the RSPB's equivalent in France.