Over a 10-year period, 10,015 male Common Pheasants Phasianus colchicus bred for hunting were banded with an individually distinct ID number and released. Of these birds, 775 (7.7%) were hunted, 545 (70%) of them within the first hunting season they experienced. Hunted birds moved an average of 3.7±4.3SD km from their release point. Six hundred and four individuals (78%) were hunted within 5 km from their release point.
During a 2010–2013 census of the number of seabird nests on Yagisihi Island the number of Japanese Cormorant Phalacrocorax capillatus nests fluctuated, whereas Slaty-backed Gull Larus schistisagus nests continuously increased. In 2013, Black-tailed Gulls L. crassirostris nested in Yagishiri Island for the first time. More than half of Slaty-backed Gull nests were located on artifacts at Yagishiri Port. Fluctuations in the number of Japanese Cormorant nests on Yagishiri Island generally corresponded with those occurring at Teuri Island.
Carcasses of 22 species of migrant birds were observed at the alpine area of Mt. Norikura in early spring (late April to middle May). These migrants died by snowstorms that they encountered during spring migration when they passed over the alpine area.