 Birdlife includes the black guillemot, velvet scoter, oystercatcher, lesser black-backed gull, western capercaillie and willow ptarmigan.Moose and hare are found on the islands, as on the mainland.Occasionally, whales have been observed in Bothnian Sea and remains of extinct Atlantic gray whale was found from Gräsö while it is not clear whether or not whales might once reached Bothnian Bay historically.