Built for the treetops
Everything about a giraffe is arranged around reaching food nothing else can. Its chief distinguishing characteristics are the extremely long neck and legs, the horn-like ossicones on top of the head, and that netted coat. Despite the length of the neck, a giraffe has the same seven neck vertebrae as almost every other mammal, including you; each one is simply enormous.
The heart. A giraffe’s heart has to push blood roughly six feet uphill to the brain, so its blood pressure is about twice that of a human’s. When the animal lowers its head to drink, all that pressure would rush the other way, so the blood vessels in the neck carry a system of one-way valves and elastic walls that close as the head goes down and keep the giraffe from passing out when it comes back up.
The tongue. A giraffe’s tongue is around a foot and a half long and dark purple to nearly black at the tip. The dark color is thought to protect it from sunburn during the hours spent feeding in full sun, and it is tough enough to strip leaves from thorny acacia branches without harm. You will see it in action at the feeding station.
The ossicones. The knobs on the head are not true horns or antlers. They are bone covered in skin and fur, present from birth (folded flat, so they do not hurt the mother) and growing thicker with age. Males often wear the tops bald from sparring with their necks.
The coat. Every giraffe’s pattern is as unique as a fingerprint. No two are exactly alike, which is how researchers tell individuals apart in the wild, and how our keepers can tell Kazar, Jill and Asha apart from across the yard.