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. 2017 Jul 27;7(17):6839–6849. doi: 10.1002/ece3.3228

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© 2017 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd.

This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Study area: (1) Limpopo Province, (2) North West Province, (3) the four degree square comprising the Gauteng 4D birding challenge, (4) Mpumalanga Province, (5) Swaziland, (6) Northern Cape Province, (7) Free State Province, (8) Lesotho, (9) KwaZulu‐Natal Province, (10) Western Cape Province, (11) Eastern Cape Province. Thick lines indicate province and country boundaries, and fine lines indicate major roads. Black squares indicate the location of sampling hubs, that is, locations with exceptionally high sampling effort. Gray shading indicates all terrestrial formal and informal protected area (SANBI, 2010, 2011)