Several species of birds lay second eggs that are eliminated by the siblicidal behavior of the
first-hatched chick. A widely accepted explanation for the occurrence of these second eggs …

Our study reports on contrasts in prey items from African Crowned Eagle Stephanoaetus
coronatus nesting in forest (n= 1) and savanna (n= 2) biomes in KwaZulu-Natal, South …

Most assessments of biodiversity are based on lists that record only the presence or
absence of selected species within a given area. Information on the actual numbers of …

Abstract Cape Vultures (Gyps coprotheres) at three colonies, Skeerpoort, Roberts' Farm and
Nooitgedacht, in the Magaliesberg range in South Africa were monitored during 2007-2009 …

Habitat fragmentation has different effects on species and communities, depending on a
suite of life-history and population traits: some species are more vulnerable to the effects of …

Some invasive species are known to compete with and even displace indigenous species.
Two Accipiter species historically indigenous to eastern South Africa have colonised the …

Influenza A viruses (IAVs) and Newcastle disease viruses (NDVs) are major human and
animal health threats with geographic differences in prevalence, characteristics and host …

Status of Cape Vultures (Gyps coprotheres) in the Magaliesberg, South Africa Page 1 Vulture
News 57 September 2007 24 Status of Cape Vultures (Gyps coprotheres) in the Magaliesberg …

Arroyo, BE, V. Bretagnolle, and A. Leroux. 2007. Interactive effects of food and age on
breeding in the Montagu's Harrier Circus pygargus. Ibis 149: 806-813. Arroyo, B., A. Amar, F …

Summary Herholdt, JJ, Kemp, AC & Du Plessis, D. 1996. Aspects of the breeding status and
ecology of the Bateleur and Tawny Eagle in the Kalahari Gemsbok National Park. Ostrich …