Longest single journey by a mammal

Humpback whales are the great long-distance travellers of the marine world, making epic journeys across the oceans in search of food or a mate. However, on 21 September 2001, a female humpback originally sighted off the coast of Brazil in August 1999 was photographed by a tourist vessel in the waters around the island of Madagascar – an astonishing 9,800 km (6,089 mi) away. Identified by its distinctive tail markings, the whale, known as Antarctic Humpback Whale Catalogue No. 1363, covered nearly a quarter of the globe in what is the longest documented single journey ever undertaken by a mammal.