"Birds: Volume Four" is part of Cassell's Book of Birds, in which you will find a fascinating description of the diversity of birds in their natural environment. Author Alfred Edmund Brehm passionately shares with you his knowledge of the customs, appearance and sounds of the winged inhabitants of our planety. With the help of illustrations and interesting facts, you will travel through the world of birds, study their features and discover even more amazing things in the natural world."