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The ninth largest animal in the world actually goes to giraffes… Giraffes weigh up to 1,750 to 4,250 pounds and are 14 to 17 feet long… They are actually the tallest land animal ever… These guys are so tall that a group of giraffes are called a tower. Another crazy thing about giraffes is that they only need 10 to 2 hours of sleep per day.