6. REVIEWS AND CRITICISM OF NOMENCLATURAL CHANGES

CLARK, A. 1976. Observations on the breeding of whistling ducks in Southern Africa. Ostrich 41 59–64.

Records collected since 1954 show that Dendrocygna viduutu breeds in the Transvaal, Natal and Rhodesia, choosing for the most part a limited mid-summer period when most rains can be expected. D. bicolor records for the Transvaal and Natal show a similar pattern but in Rhodesia breeding is not so restricted. In the Transvaal and Natal most records were obtained near the more populated areas at man-made or artificial breeding grounds. Information is given on nest sites and construction, clutch and brood size, and the behaviour of nesting birds. The percentages of juveniles in flocks of D. viduuta following the breeding season are compared showing the apparent effect of rainfall on breeding success.