The book contains a complete description of the natural history and biology of the Ratites and Tinamous - the group of flightless birds that includes ostriches, emus, cassowaries and kiwis. Each species is treated in turn, with seven general introductory chapters and full colour illustrations of all 55 species, as well as over 50 line drawings. The author has spent 25 years research on the ratites and has drawn together the extensive and often inaccessible literature on the groups.