THE BLACK DUCK IN THE SOUTH-WESTERN CAPE

REFERENCES

• Benson , C. W. 1963 . Breeding seasons of game birds in the Federation of Rhodesia and Nyasaland . The Puku , No. 1 (51
   Google Scholar
• Brand , D. J. 1961 . “ A Comparative study of the Cape Teal (Anas capensis) and the Cape Shoveller (Spatula capensis) with special reference to breeding biology, development and food requirements ” . In Unpubl. thesis, Dept. Zool Unisa
   Google Scholar
• Clancey , P. A. 1964 . The Birds of Natal and Zululand Edinburgh
   Google Scholar
• Delacour , J. 1956 . The Waterfowl of the World Vol. 2 , London
   Google Scholar
• Delacour , J. 1964 . The Waterfowl of the World Vol. 4 , London
   Google Scholar
• Harrison , A. D. 1958 . Hydrobiological Studies on the Great Berg River, Western Cape Province Part 2 . Trans. Roy. Soc. S.A. , 35 ( 3 ) : 227
   Google Scholar
• Harrison , A. D. and Elsworth , J. F. 1958 . Hydrobiological Studies on the Great Berg River, Western Cape Province. Part 1 . Trans. Roy. Soc. S.A. , 35 ( 3 ) : 125
   Google Scholar
• Harrison , J. M. and And , J. G. 1963 . A Gladwall with a white neck ring and a review of plumage variants in wildfowl . Bull. Brit. Orn. cl. , 83 : 100
   Google Scholar
• Harrison , J. M. 1964 . “ Plumage variation. ” . In In a new Dictionary of Birds Edited by: Thomson .
   Google Scholar
• Hori , J. 1963 . Three-bird flights in the Mallard . Wildfowl Trust 14th Ann. Rep.: , : 124
   Google Scholar
• Horsbrugh , B. 1912 . The Game Birds and Waterfowl of South Africa London
   Google Scholar
• Johnsgard , P. A. 1965 . Handbook of Waterfowl Behaviour London
   Google Scholar
• Mackworth-Praed , C. M. and Grant , C. H. B. 1962 . Birds of the Southern Third of Africa Vol. 1 , London
   Google Scholar
• McKinney , D. F. 1965 . Spacing and chasing in breeding ducks . Wildfowl Trust 16th Ann. Rep: , : 92
   Google Scholar
• McLachlan , G. and Liversidge , R. 1957 . Roberts' Birds of South Africa Cape Town
   Google Scholar
• Middlemiss , E. H. J. 1958 . “ The Southern Pochard ” . In Netta crythrophthalma brunnea. Ostrich Suppl. 2
   Google Scholar
• Rowan , M. K. 1963 . “ The Yellowbill Duck Anus undulata in Southern Africa ” . In Ostrich Suppl. 5
   Google Scholar
• Siegfried , W. R. 1965 . The Cape Shoveller Anas smithii in Southern Africa . Ostrich , 36 ( 4 ) : 155
   Google Scholar
• Smith , R. I. 1963 . “ The social aspects of reproductive behaviour in the Pintail. ” . In Unpubl. Thesis Logan : Utah State University .
   Google Scholar
• Winterbottom , J. M. 1965 . Cape Bird Club, Newsletter No. 78,1965
   Google Scholar