This photo was taken by Abdurahman Al Qadrie in West Kalimantan in early April this year. Thanks to Pak Abdurahman for permission to post the photo on my blog, and to Bas van Balen for drawing my attention to it.
Pak Abdurahman thought he was looking at a Common Greenshank till the bird flew, when it revealing this amazing wing pattern.
I believe it is a Common Greenshank, showing an extraordinary form of leucism. What do you make of it?