MOULTS AND MOULT LOCALITIES OF THE SOUTH AFRICAN SHELDUCK

References

• Bellrose , F. S. 1976 . Ducks, geese and swans of North America Harrisburg : Stackpole Books .
   Google Scholar
• Clancey , P. A. 1967 . Gamebirds of southern Africa Cape Town : Purnell. .
   Google Scholar
• Dean , W. R. J. 1978 . Moult seasons of some Anatidae in the Western Transvaal . Ostrich , 49 : 76 – 84 .
   Web of Science ®Google Scholar
• Farkas , T. 1962 . “ Contribution to the bird fauna of Barberspan. ” . In Ostrich Suppl. 4
   Google Scholar
• Frost , P. G. H. 1974 . Some problems of southern African waterfowl biology . Safring News , 3 : 9 – 11 .
   Google Scholar
• Frost , P. G. H. , Ball , I. J. , Siegfried , W. R. and McKinney , F. 1979 . Sex ratios, morphology and growth of the African Black Duck . Ostrich , 50 : 220 – 233 .
   Web of Science ®Google Scholar
• Geldenhuys , J. N. 1975 . Waterfowl (Anatidae) on irrigation lakes in the Orange Free State . Ostrich , 46 : 219 – 235 .
   Google Scholar
• Geldenhuys , J. N. 1976a . Breeding status of waterfowl at large lakes in the Orange Free State . Ostrich , 47 : 137 – 139 .
   Google Scholar
• Geldenhuys , J. N. 1976b . Relative abundance of waterfowl in the Orange Free State . Ostrich , 47 : 27 – 54 .
   Google Scholar
• Geldenhuys , J. N. 1977 . Feeding habits of South African Shelduck . S. Afr. J. Wildl. Res. , 7 : 5 – 9 .
   Google Scholar
• Geldenhuys , J. N. 1980 . “ Breeding seasons of Egyptian Geese and South African Shelduck in central South Africa. ” . In Proc. 4th Pan—Afr. Orn. Congr: 267 – 275 .
   Google Scholar
• Heinroth , O. 1911 . “ Beiträge zur Biologie, namentlich Ethologie und Psychologie der Anatiden. ” . In Proc. 5th Int. Orn. Congr.: 598 – 702 .
   Google Scholar
• Johnsgard , P. A. 1965 . Handbook of waterfowl behaviour Ithaca : Cornell Univ. Press. .
   Google Scholar
• Shewell , E. L. 1959 . The waterfowl of Barberspan . Ostrich Suppl. , 3 : 160 – 179 .
   Google Scholar
• Siegfried , W. R. 1967 . Trapping and ringing of Egyptian Geese and African Shelduck at Vogelvlei, Cape . Ostrich , 38 : 173 – 178 .
   Google Scholar
• Siegfried , W. R. 1965 . Non—breeding plumage in the adult male Maccoa Duck . Ostrich , 39 : 91 – 93 .
   Google Scholar
• Skead , D. M. and Dean , W. R. J. 1977 . Seasonal abundance of Anatidae at Barberspan . Ostrich Suppl. , 12 : 49 – 64 .
   Google Scholar
• Taylor , J. S. 1944 . Notes on the South African Shelduck . Ostrich , 15 : 988 – 193 .
   Google Scholar