1. British Trust for Ornithology Scotland, Beta Centre (Unit 15), Stirling, UK
2. British Trust for Ornithology, The Nunnery, Thetford, Norfolk, UK
3. Remote Sensing Group, Plymouth Marine Laboratory, Plymouth, UK
4. UK Centre for Ecology & Hydrology Edinburgh, Midlothian, UK
5. Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Amsterdam, Netherlands
6. Comers Wood Croft, Midmar, Inverurie, UK