badesc

This looks more a Eurasian Wigeon x American Wigeon hybrid.

Some studies and photos of hybrids can be found here: http://birdhybrids.blogspot.com/ ... -hybrid-birds.html.

badesc

Yes, you're right!

I saw such Wigeons at Mai Po as well, and I thought about your record. Agree that they're most probably just pure Eurasian Wigeons.

Thanks for bringing this up again, I should have posted a follow-up myself.