Eastern Spot-billed Duck Anas zonorhyncha

Sometimes known as Chinese Spotbill, this taxon was formerly treated as a subspecies of Indian Spot-billed Duck Anas poecilorhyncha (and known collectively as Spotbill or Spot-billed Duck).

I have only encountered this species in captivity.

captive Eastern Spot-billed Duck, Martin Mere (Lancashire, UK), 26th December 2014