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)「Photos by Pete McBride @pedromcbride | Above and below: When a giant male orca—named Melvin by local fishermen and identified by unique markings on his six-foot-high (2m) dorsal fin—swam toward me and pinged me with his "sonar," it was one of the most intense wildlife encounters I've experienced in my years on assignment. Orcas use echolocation to gather information about their environment, whether for finding food or learning more about intruders like me. It allows them to hunt in almost complete darkness, which helps them thrive in areas like the waters off the coast of Norway. For more wildlife, follow @pedromcbride.」11月2日 21時00分