Atlantic puffin
Otters, grey seals, killer whales and harbour porpoises are frequently seen on and around Papa Stour. Atlantic puffin, Arctic and common tern, bonxie and Arctic skua, northern fulmar, common guillemot, razorbill, curlew, wheatear, ringed plover and great black-backed gull all breed on the island, and numerous migratory species have been recorded.