Evidence of age-related improvement in the foraging efficiency of Adélie penguins - Lescroël, Amélie; Ballard, Grant; Massaro, Melanie; Dugger, Katie; Jennings, Scott; Pollard, Annie; Porzig, Elizabeth; Schmidt, Annie; Varsani, Arvind; Gremillet, David; Ainley, David (Scientific Reports, 2019)