Attributes / relations provided by
♦ 1Annual Variation in Diet of Breeding Great Cormorants: Does it Reflect Varying Recruitment of Gadoids?, SVEIN-HÅKON LORENTSEN, DAVID GRÉMILLET AND GEIR HÅVARD NYMOEN, Waterbirds 27(2): 161-169, 2004
♦ 2del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.).
Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.