Giraffe

Tallest on Earth: Giraffes are the tallest land mammals in the world, with heads that may tower 20 feet above ground. Their great height allows them to reach the leaves of the spiny trees that are their staple. They pluck the buds, fruit and leaves of these trees with prehensile upper lips and long tongues that can be extended up to 18 inches. They also eat grasses, seeds, grains and other low-lying vegetation.

Shy and Hunted: Their herds of 20 to 40 individuals are led by a dominant, usually old, bull. Shy animals, they possess keen senses of smell and hearing, which help them stay clear of predators. Once widespread and abundant, giraffes have been heavily hunted for their flesh and hides.