Attributes / relations provided by
♦ ¹del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.
♦ ²FEEDING ECOLOGY AND BODY SIZE DEPENDENCE ON DIET OF THE SOOTY SHEARWATER, PUFFINUS GRISEUS, IN THE NORTH PACIFIC, Kouzi SHIOMI and Haruo OGI, Proc. NIPR Symp. Polar Biol., 5, 105-113, 1992