1. School of Biological Sciences, Zoology Building University of Aberdeen Aberdeen UK
2. Scottish Chough Study Group Kindrochaid, Bridgend, Isle of Islay Argyll UK
3. Institute of Zoology Zoological Society of London London UK
4. Department of Integrated Land Management Scotland's Rural College Ayr UK
5. Institute of Biodiversity Animal Health & Comparative MedicineUniversity of Glasgow Glasgow UK
6. Centre for Biodiversity Dynamics Institutt for Biologi Realfagbygget, NTNU Trondheim Norway