Presence of King penguins (Aptenodytes patagonicus) on Elephant Island provides further evidence of range expansion

King penguins (Aptenodytes patagonicus) are a circumpolar sub-Antarctic species inhabiting most of the major sub-Antarctic island chains of the Southern Ocean, the Falkland Islands, and regions of Patagonia. Despite early suggestions to the contrary, there is no conclusive historical evidence of King penguin inhabitation of the Antarctic Peninsula or the South Shetland Islands until the past decade. After a near-complete survey of Elephant Island, we report widespread presence of this species, including documented incubation at one site and molting at another. While we found no evidence of King penguins successfully fledging a chick at any of the sites where individuals were found, their presence across numerous sites suggests the potential for future range expansion in response to warming conditions.