1. State Lab for Photon Energetics, Bauman Moscow State Technical University, 5-1, 2nd Baumanskaya Str., 105005 Moscow, Russia
2. Wildfowl and Wetlands Trust, Newgrounds, Slimbridge, Gloucestershire GL2 7BT, UK
3. Durrell Wildlife Conservation Trust, Les Augres Manor, La Profonde Rue, Trinity, Jersey JE3 5BP, UK
4. Birds Russia, 70-1, Nizhegorodskaya Str., 109052 Moscow, Russia
5. Zoological Museum, Lomonosov Moscow State University, 2, Bolshaya Nikitskaya Str., 125009 Moscow, Russia
6. British Trust for Ornithology, The Nunnery, Thetford, Norfolk IP24 2PU, UK
7. Conservation Science Group, University of Cambridge, Downing Street, Cambridge CB2 3EJ, UK
8. Institute of Geography, Russian Academy of Sciences, 29, Staromonetniy Lane, 119017 Moscow, Russia