ナショナルジオグラフィックさんのインスタグラム写真 - (ナショナルジオグラフィックInstagram)「Photo by Paul Nicklen @PaulNicklen | The ridges of an iceberg, shaped by persistent ocean currents, provide the perfect resting spot for this lone chinstrap penguin. While adult penguins can swim up to 80km a day, it takes a while for young penguins to reach this distance with ease. They are adjusting to their life at sea and developing breast muscles, which can leave them particularly vulnerable to hungry Antarctic predators. #FollowMe at @PaulNicklen for more photos of penguins in #Antarctica. #polar #penguins #iceberg」5月6日 6時34分