On Hokkaido, eagles are attracted by abundant Pacific cod ("Gadus macrocephalus") which peak in the Rausu Sea and the Nemuro Straits in February. This resource supports an important commercial fishery which in turn helps to support eagles. Alaska pollock ("Gadus chalcogrammus"), along with the cod, is the most important food source for wintering eagles in Japan. These eagles may walk boldly within a few feet of fishermen when both are capturing fish during winter, but only familiar ones they have encountered previously: they behave warily and keep their distance if strangers are present.