Do grey whale migrate?
• Grey whales have the longest migration route of any mammal. Each year they cover more than 9,000 km travelling between their summer feeding areas in Alaska and the Bering sea, and their winter breeding lagoons in Baja California, Mexico. • Migrating grey whales travel 60 to 80 km each day, often close enough to shore that they can be sighted from land. They navigate by following the contours of the sea floor. Some whales spend their summers in B.C. instead of travelling further north; this group is known as the summer-resident grey whales. Where do grey whales live? Winter breeding • Grey whales spend winters, from January to March, in the warm waters of Baja California, Mexico, where pregnant females give birth. By late February, they start swimming northward. Adult males, newly-pregnant females and juveniles leave first, followed by females and their calves. Some grey whales start feeding when they reach the waters along Vancouver Island, although in some years, some start feeding
