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At birth, Humpback whale calves are between 13 and 15 feet in length. They feed from their mothers rich milk for approximately one year and can grow up to 1.5 feet per month.

Humpback calves are born the length of mother's head, so the calves length and weight can vary greatly. Females run larger than males, with the largest being OVER 60 feet in length and she is part of the North Pacific stock. Her calves are around 20 feet at birth weighing in at 2 tons. Calves are seen 10' to 20 feet and weighing 1 to 2 tons. They gain about 100 lbs daily and grow 1 foot per month, according to Dr. Jim Darling of Whale Trust.

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12y ago

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