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During their migration trips the blue whale can travel thousands of miles from one location to the next. While they migrate most whales will forgo eating food and live primarily off of blubber/body fat and stored calories.
A female gives birth to a calf every two to three years and is pregnant for 10 to 12 months before giving birth. Young are born in warm, low latitude waters in the winter months. A baby blue whale averages 23 feet (7 meters) long and 4,400 pounds (1,990 kg) when born. It is fed by its mother's milk for 7 to 8 months.