In winter, many ducks and geese stay in Shinji-ko and Nakaumi.
Greater Scaup (Aythya marila) and Tufted Duck (Aythya fuligula) are dominant in these lake.
Greater white-fronted goose (Anser albifrons) and Bean goose (Anser fabalis) are found around mouth of Hiikawa and Yonago waterbirds sanctuary.
Common Shelduck (Tadorna tadorna) and Baikal Teal (Anas formosa), these are mainly seen in western Japan, stay around here(But I couldn't find Baikal Teal).
I found hybrid duck (Mallard-Spotbill) in Mallards' group.