The tallest living quadruped is the GIRAFFE, which has seven letters. Giraffes are native to Africa and are the tallest land animals in the world, with males reaching heights of up to 5.5 meters (18 feet). They have long necks and legs and their fur is patterned with brown patches. Giraffes are herbivores and feed on leaves, flowers, and fruits from trees. They are also known for their long tongues, which can reach up to 45 centimeters (18 inches) in length.