The authors regret the inclusion of an error in the originally published above article. The affiliations of authors H. Ann Scott and Jessica M. Shaw were cited incorrectly and additional funding details were erroneously omitted.
The correct affiliation for H. Ann Scott l is NamPower/Namibia Nature Foundation Strategic Partnership, Windhoek, Namibia. The correct affiliation for Jessica M. Shaw is FitzPatrick Institute of African Ornithology, DST-NRF Centre of Excellence, University of Cape Town, Private Bag X3, Rondebosch 7701, South Africa.
The missing funding details are as follows: This work was co-funded by the project NORTE-01-0246-FEDER-000063, supported by Norte Portugal Regional Operational Programme (NORTE2020), under the PORTUGAL 2020 Partnership Agreement, through the European Regional Development Fund (ERDF).
The article has now been updated and corrected online.