Caz Buckingham and Andrea Pinnington spend most of their time outside listening, looking and learning.

This book is the culmination of years of wondering, 'What bird made that sound?' They hope to inspire a new generation of bird lovers and solve many family arguments at the same time.

Andrea Pinnington has written and edited all kinds of books for children and is the creative whizz behind a stack of children's craft and activity books.

She lives in Guildford, Surrey.