Kees Woutersen Author

Kees Woutersen has lived in Huesca for 20 years, working as a nature and bird guide throughout Spain. He runs his own travel company and is author of various books on the birds and natural history. This is his 5th Crossbill Guide. Dirk Hilbers set up the Crossbill Guides Foundation and travels Europe to research the guidebooks. This is the 23rd guide he has worked on. As a biologist, when not in the field, Dirk Hilbers is a lecturer at the University of Amsterdam.