This is the emblematic first volume of the series, published in 1992. It features a Foreword by Christoph Imboden, presenting the project. There is also a 38-page introductory article, providing a complete general description of the biology of birds.Following the taxonomical order of the encyclopaedia, the volume covers the 27 bird families. Some groups are geographically highly localized (cassowaries, kiwis, Shoebill), or found on only one continent (Ostrich, rheas, emus, tinamous, Hamerkop, screamers), but the greater part of the volume is dedicated to the families of marine and aquatic birds with extensive distributions in the northern hemisphere (divers), the tropical zone (tropicbirds, darters, frigatebirds), in Antarctic and sub-Antarctic waters (penguins, albatrosses, diving-petrels), and cosmopolites (grebes, petrels, pelicans, herons, flamingos, ducks, geese and swans).
The Handbook of the Birds of the World (HBW) is a multi-volume series produced by the Spanish publishing house Lynx Edicions in partnership with BirdLife International. It is the first handbook to cover every known living species of bird. The series was edited by Josep del Hoyo, Andrew Elliott, Jordi Sargatal and David A. Christie.
Material in each volume is grouped first by family, with an introductory article on each family; this is followed by individual species accounts (taxonomy, subspecies and distribution, descriptive notes, habitat, food and feeding, breeding, movements, status and conservation, bibliography). In addition, all volumes except the first and second contain an essay on a particular ornithological theme. More than 200 renowned specialists and 35 illustrators (including Toni Llobet, Hilary Burn, Chris Rose and H. Douglas Pratt) from more than 40 countries have contributed to the project up to now, as well as 834 photographers from all over the world.
As a complement to the Handbook of the Birds of the World and with the ultimate goal of disseminating knowledge about the world's avifauna, in 2002 Lynx Edicions started the Internet Bird Collection (IBC). It is a free-access, but not free-licensed, on-line audiovisual library  of the world's birds with the aim of posting videos, photos and sound recordings showing a variety of biological aspects (e.g. subspecies, plumages, feeding, breeding, etc.) for every species. It is a non-profit endeavour fuelled by material from more than one hundred contributors from around the world.
This volume was published in 1992. Unlike subsequent volumes, it does not have an introductory essay; instead, it has a 38-page overview by Eduardo de Juana of the biology of birds and a foreword welcoming the HBW project, by Christoph Imboden. Groups covered in this volume are as follows:
This volume was published in July 2013. It includes a comprehensive introduction by Jon Fjeldså on changes in bird macrosystematics and a foreword on the history of BirdLife International. It covers 84 new species published more recently than their corresponding HBW volumes, including 15 scientific descriptions of newly discovered Amazonian birds. 2b1af7f3a8