Tufted Duck (Aythya fuligula) キンクロハジロ also Tufted Pochard
A male Tufted Duck sometimes has a little purple in the head. They small diving ducks. Amami 2024
An immature male Tufted Duck doesn’t have all white flanks. Tokyo 2007
Tufted Duck キンクロハジロ
Birds of Amami