The first ever Illustrated Checklist of the Birds of the World is really two works in one. It is a complete checklist whose taxonomy incorporates the most up-to-date information and an exhaustive methodology (Tobias et al. 2010) in an entirely systematic and consistent way. At the same time, it contains illustrations and distribution maps for every bird species in the world. This includes the original artwork from the HBW series, as well as hundreds of new illustrations, all in two compact volumes.
Volume 1: Non-passerines: 35 orders, 105 families, 988 genera, 4,372 extanct species, 99 extinct species. 904 pages, 357 plates, 8,290 bird illustrations and 4,428 distribution maps. Volume 2: Passerines: 1 order, 138 families, 1,358 genera, 6,592 extanct species, 57 extinct species. 1,013 pages, 446 plates, 12,629 bird illustrations and 6,649 distribution maps.