Age structure and roosts of African Black Oystercatchers in the Sperrgebiet and an estimate of Namibia's total population
African Black Oystercatchers are endemic to southern African shores and occur in unknown numbers on rocky stretches of coastlines in southern Namibia. We undertook a second survey of their populations in the seldom visited Sperrgebiet (Diamond Area) in November 2002, to look for colour ringed birds, and to assess age structures of all birds seen.
Proceedings of a workshop on 1 April 2008 at Swakopmund, page 16