References

Taxonomically we follow:
Gill, F and D Donsker 2018. IOC World Bird List (v 8.1)

………………………………………………………………………………………………

Selected References:
Birding Frontiers
Blasco-Zumeta, J & Heinze, G-M Identification Atlas of Birds of Aragon
British Library
Chappuis, C 1987, Migrateurs et hivernants
Constantine, M & The sound approach 2012, Catching the bug, Poole
Couzens, D & Nurney, D 2013, Bird ID Insights, digital edition, London
del Hoyo, J et. al Handbook of the Birds of the World alive, Barcelona
Dutch Birding
Forsman, D 2016, Flight Identification of Raptors of Europe, North Africa
and the Middle East, digital edition, London
Jännes, H 2003, Calls of eastern vagrants, Helsinki
Limicola
Macaulay Library
Message, S & Taylor, D 2013, Waders of Europe, Asia and North America,
digital edition, London
Ottenby Fågelstation Ringers‘ Digi Guide
Robb, M & Dutch Birding 2003, Out of the blue, Santpoort-Zuid
Svensson, L, Mullarney, K & Zetterström, D 2014, Collins Bird Guide,
digital edition, London
van Duivendijk, N 2011, Advances Bird ID Handbook, The Western
Palaearctic, New Holland
Vinicombe, K, Harris, A & Tucker, L 2014, The Helm Bird Guide
to Bird Identification, digital edition, London
Xeno-Canto
and countless birds sound records…