1. Branch Oceans & Coasts, Department of Environmental Affairs, Foretrust Building, Martin Hammerschlag Road, Cape Town, South Africa
2. Animal Demography Unit, University of Cape Town, Rondebosch, South Africa
3. Farallon Institute, Suite Q, 101 H Street, Petaluma, CA, USA
4. Climate Impacts Group, University of Washington, 4001 1st Ave NE Seattle, WA, USA
5. Environment and Sustainability Institute, University of Exeter, Penryn, Cornwall, UK
6. Bristol Zoological Society, Clifton, Bristol, UK
7. FitzPatrick Institute of African Ornithology, University of Cape Town, Rondebosch, South Africa