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Investigations were carried out in three fish-pond complexes in 1993-1999. Clutches were initiated 21 April-9 July (mean 11 May). The average clutch size was 3.83 ± 0.44. In total 66.3% breeding pairs reared fledglings (n = 163). The population studied had a higher hatching success (83.4%) compared to data reported in literature but fledging success (1.29 young per breeding, and 1.94 per successful...
A total of 499 breeding pairs of the Southern Bald Ibis Geronticus calvus at 73 sites were recorded in the Free State, South Africa. The breeding density was calculated as 15 pairs per 1000 km². The size of the breeding sites ranged from one to 57 pairs. Only 11 breeding sites (14%) contained ten or more breeding pairs, while 12 sites (15%) consisted of single breeding pairs only. Adult: immature...
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