The island was once the home of puffins and Manx shearwater. The Manx shearwater has a remarkable life. Formerly considered a subspecies of the Manx shearwater, its actual relationships are unresolved. The stiff flight, like a large Manx shearwater, is also distinctive. The Manx shearwater is with a wingspan and weighs . It was intermediate in size between the Manx shearwater and the little shearwater. The Seabird 2000 breeding seabird survey recorded five occupied nests of Manx shearwater ("Puffinus puffinus"). The seabird survey in 2000 also recorded 34 occupied nests of Manx shearwater ("Puffinus puffinus"). The Manx shearwater is entirely marine, typically flying within of the sea surface. Both Manx shearwater and storm petrels are also thought to breed on the island . The Manx shearwater colony on Copeland Islands holds more than 1.7% of the world population. The Manx shearwater ("Puffinus puffinus") is a medium-sized shearwater in the seabird family Procellariidae.