We would like to acknowledge the significant contributions from the following people:
Audubon: Greg Butcher, Kathy Dale, Andrew Farnsworth, Frank Gill, Mike Harris, Alethea Pratt, Robert Ridgeley
BirdLife Secretariat: Mark Balman, Leon Bennun, Martin Sneary
Kuşbank/Doğa Derneği: Sezgin Erdoğan, Bahtiyar Kurt, Nuri Özbağdatli, Esra Per, Handan Tezbaşaran
Kuşbank/Erciyes University: Uygar Özesmi
Natur Vårds Verket: Johan Nilsson
NatureKenya: Bernd de Bruijn, Paul Matiku, John Musina, Itai Shanni
RSPB: Paul Donald, Ian Fisher, Alistair Gammell, David Gibbons, Rachel Roberts, José Tavares, Gregor Waddell
We would also like to thank British Airways for their support with this work. Finally, special thanks go to Isabelle Fowler and Alex Gonzalez-Calatayud for their help with translation.