I went for a lunchtime walk alongside the river in Tagawa (near Fukuoka Prefectural University where I work) and found this flock of wigeons. They were a bit shy so I had to take the photos on full zoom, which reduced the quality. This species of dabbling duck is really handsome, with a striking white speculum. It is migratory and comes to Japan for the winter then returns to Siberia for breeding.
Wigeon = hidorigamo