Fig. 1
From: First record of an Adélie penguin at sub-Antarctic Marion island
a The known breeding localities of the Adélie penguin (Pygoscelis adeliae;data from Lynch and LaRue (2014) and Humphries et al. (2017)), historic sightings of Adélie penguins in black dots (Prince and Croxall, 1983; Downes et al., 1959; Tuffy and Fazackerly, 1984; Ausilio and Zotier, 1989; Cossee and Mills, 1993; Morrison, 2013; Copson and Brothers, 2008) and location of the Prince Edward Archipelago. b The Prince Edward Archipelago showing the first (top arrow) and second (bottom arrow) sightings of an Adélie penguin at Marion Island on 28 October 2015