| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Handbook of the Birds of the World, Volume 11: Old World Flycatcher's to the Old World Warblers | 978-84-96553-06-4 (84-96553-06-X) | 2006 | Josep Del Hoyo · David Christie · Cagan Sekercioglu |
| Handbook of the Birds of the World, Volume 12: Picathartes to Tits and Chickadees | 978-84-96553-42-2 (84-96553-42-6) | 2007 | Josep Del Hoyo · David Christie |