This is a species of flying squirrel called Ezo Momonga in Japanese (Pteromys volans orii). It is a sub-species of Siberian flying squirrels that is found on the island of Hokkaido in Japan. These squirrels are primarily nocturnal and usually shy, though the squirrels can occasionally be seen during the day. They prefer to take up residence in holes made by woodpeckers, as seen here. This individual is just emerging from a hole in a Sakhalin fir tree (Abies sachalinensis) at dusk, in preparation for a night of foraging. These small animals are particularly wary when they emerge, as they must be on the lookout for predators like owls and weasels. Their diet primarily comprises leaves, seeds, cones, buds, sprouts, nuts and berries. This species does not hibernate.
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