Addition No. IV of the present article contains some newly recorded localities of the Japanese Anserine Birds, mostly known from the years between 1975 and 1976. It includes 4 interesting species such as the Blue Goose (Anser c. caerulesence), the Javan Tree Duck (Dendrocygna javanica), Canvasback (Aythya valisineria) and the Surf Scoter (Melanitta perspicillata).
