| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Owls | 978-1-873403-74-7 | 2000 | Jan-Hendrik Becking · Freidhelm Weick |
| Owls: A Guide to the Owls of the World | 978-0-300-07920-3 | 1999 | Friedhelm Weick · Jan-Hendrik Becking |
| Owls of the World | 978-0-300-14227-3 | 2009 | Friedhelm Weick · Jan-Hendrik Becking |
| Owls of the World | 978-0-7136-6548-2 | 2008 | Freidhelm Weick · Jan-Hendrik Becking |
C. K. · Claus König · Claus Koenigs · Claus Kunz · Claus Kunze
A & C Black Publishers Ltd · Pica Press · Yale University Press