THANKS TO...

Leander Khil for his expert guidance: leanderkhil.com

Kosmos Natural History Books for facilitating my trip: kosmos.de

More information on birding in Vienna:

Birding Austria: bird.at Reference guides:

Collins Bird Guide – Lars Svensson, Killian Mullarney & Dan Zetterström.

Photographic Guide to Birds of Europe, North Africa & the Middle East – Frédéric Jiguet & Aurélien Audevard.