Attributes / relations provided by
♦ ¹SPATIAL AND TEMPORAL PATTERNS OF DIET IN THE CAPE CORMORANT OFF SOUTHERN AFRICA, DAVID CAMERON DUFFY, RORY PAUL WILSON, AND MARIE PIERRE WILSON, The Condor 89:830-834 (1987)
♦ ²A. L. Batchelora & G. J. B. Rossa, THE DIET AND IMPLICATIONS OF DIETARY CHANGE OF CAPE GANNETS ON BIRD ISLAND, ALGOA BAY, Ostrich: Journal of African Ornithology Volume 55, Issue 2, 1984
♦ ³del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.