Kees Woutersen (NL, 1956) has lived in Huesca (Spain) for 20 years, working as a wildlife 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 6th Crossbill Guide.Dirk Hilbers (NL, 1976), set up the Crossbill Guides Foundation and travels Europe to research the guidebooks. This is the 25th guide he's worked on. When not in the field, Dirk Hilbers is a lecturer in environmental ethics at the University of Amsterdam.

Everything you need to turn up in the right place and at the right time to find some of the best wildlife in Europe. Chris Packham, BBC Springwatch

Kees Woutersen (NL, 1956) has lived in Huesca (Spain) for 20 years, working as a wildlife 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 6th Crossbill Guide.Dirk Hilbers (NL, 1976), set up the Crossbill Guides Foundation and travels Europe to research the guidebooks. This is the 25th guide he's worked on. When not in the field, Dirk Hilbers is a lecturer in environmental ethics at the University of Amsterdam.

Everything you need to turn up in the right place and at the right time to find some of the best wildlife in Europe. Chris Packham, BBC Springwatch