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CONTRIBUTORS TO THIS ISSUE Tim Birkhead , Tom Clynes , Alex Dale , John Fanshawe , Jude Funwhi , Shaun Hurrell , Ann Louise Kinmonth , Irene Lorenzo , Bill Morris , Hannah Mumby , Edward Perry , John Daniel Pullan , Alice Reisfeld , Judith Rumgay , Claire Thompson , Gui-Xi Young , Hannah Wheatley
JUNE 2017 NUMBER 2 VOLUME 39 ISSN 2519-4658
SCIENCE EDITORS Tris Allinson , Ian Burfield , Andy Symes
FRONT COVER Northern Gannet Morus bassanus © Ondrej Prosicky / Shutterstock
CHIEF EDITOR Luca Bonaccorsi The views expressed are those of the contributors and not necessarily those of BirdLife International .
GRAPHIC DESIGN Andrea Canfora Printed by On Demand Print Services Ltd
Printed on processed chlorine-free paper made from at least 80 % post-consumer waste recycled fibre .
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OFFICERS OF BIRDLIFE INTERNATIONAL President Emeritus Her Majesty Queen Noor of Jordan Honorary President Her Imperial Highness Princess Takamado of Japan Honorary Vice-Presidents Baroness Young of Old Scone ( UK ), Gerard A Bertrand ( USA ), A . P . Leventis ( UK ), Ben Olewine IV and Peter Johan Schei Chief Executive Patricia Zurita , Chairman Khaled Anis Irani , Treasurer Nick Prentice
COUNCIL OF BIRDLIFE INTERNATIONAL Africa Achilles Byaruhanga ( Uganda ) and Idrissa Zeba ( Burkina Faso ), Asia Sarath Wimalabandara Kotagama ( Sri Lanka ) and Shawn Lum ( Singapore ), Americas Peg Olsen ( USA ), Jaqueline Goerck ( Brazil ) and Yvonne A . Arias ( Dominican Republic ), Europe Luís Costa ( Portugal ), Nada Tosheva-Illieva ( Bulgaria ), Fred Wouters ( Netherlands ) and Mike Clarke ( UK ), Middle East Imad Atrash ( Palestine ) and Assad Adel Serhal ( Lebanon ), Pacific Philippe Raust ( French Polynesia ) and Paul Sullivan ( Australia )
GLOBAL ADVISORY GROUP TO THE CHIEF EXECUTIVE Chair Susan Orr , Former Chair Wendy Paulson , Jane Alexander , Nathalie Boulle , Appy Chandler , Christie Constantine , Scott Dresser , Joe Ellis , David Ford , Richard Hale , Pamela Isdell , Barbara Young , James Kushlan , Tasso Leventis , Hector Morales , Ben Olewine , Nick Prentice , Warren Evans , Terry Townshend , Daniel Gauthier , John S . Adams , Piyush Gupta
BIRDLIFE is published quarterly by BirdLife International , The David Attenborough Building , Pembroke Street , Cambridge CB2 3QZ , UK Tel . + 44 ( 0 ) 1223 277318 | Fax + 44 ( 0 ) 1223 277200 | Email birdlife @ birdlife . org | UK registered charity n . 1042125 BirdLife International is a worldwide partnership of conservation organisations working to protect the world ’ s birds and their habitats .
The production of BIRDLIFE is generously supported by the A . G . Leventis Foundation .
4 BIRDLIFE • JUNE 2017