South African National Biodiversity Institute, Private Bag X7, Claremont 7735, South Africa;
Statistics in Ecology, Environment and Conservation, Depart?ment of Statistical Sciences, University of Cape Town, Rondebosch 7701, South Africa;
BirdLife South Africa, Private Bag X5000, Parklands 2121, South Africa;
Applied Behavioural Ecological and Ecosystem Research Unit (ABEERU), UNISA, Private Bag X6, Florida 1717, South Africa;
Animal Demography Unit, Department of Biological Sciences, University of Cape Town, Ronde?bosch 7701, South Africa;
Statistics in Ecology, Environment and Conservation, Depart?ment of Statistical Sciences, University of Cape Town, Rondebosch 7701, South Africa;
African Climate and Development Initiative, University of Cape Town, Rondebosch 7701, South Africa;