Breaching humpback whale juvenile. The majority of the humpback whales in Southeast Alaska, including Glacier Bay, are born on breeding grounds around the Hawaiian Islands. Female humpback whales give birth to one calf at a time. When they are just a few months old, the calves accompany their mothers on the 2,500+ mile migration to Southeast Alaska for the summer. By the time the mother returns to the breeding grounds the following winter, she has generally weaned the calf, who is on its own. Photographer: Tom Bergman