Change in moult behaviour of African penguins Spheniscus demersus on Robben Island

This paper reports a change in the location of moulting adult African penguins on Robben Island over the period 1998 to 2020. Until 2004, the birds tended to moult along the coastline. By 2020, nearly all the birds moulting on the island appear to do so inland at or near to their nest sites. This behavioural change has implications for estimates of total population size made using counts of moulting birds that do not include the inland moulters.