1. DST‐NRF Centre of Excellence at the FitzPatrick Inst. of African Ornithology, Dept of Zoology and Entomology, Univ. of Pretoria Hatfield South Africa
2. Dept of Biology, Univ. of New Mexico Albuquerque NM USA
3. School of Biological Sciences, The Univ. of Western Australia Crawley WA Australia
4. FitzPatrick Inst. of African Ornithology, DST–NRF Centre of Excellence, Univ. of Cape Town Rondebosch South Africa
5. Dept of Zoology and Entomology, Rhodes Univ. Grahamstown South Africa
6. South African Research Chair in Conservation Physiology, South African National Biodiversity Inst. Pretoria South Africa