Reticulated giraffes are a giraffe subspecies that live in open woodlands and wooded grasslands in Somalia, northern Kenya, and southern Ethiopia, one of nine giraffe subspecies in Africa. They are herbivores whose diet centers on Acacia, Commiphora, and Terminalia leaves, and they feed by browsing, typically eating continuously throughout the day. Using a tongue up to 18 inches long, a giraffe scrapes leaves from tree branches and consumes thorns, bark, bugs, and anything else on the branch. Reticulated giraffes are ruminants like cattle, with four-part stomachs, and when not feeding during the day they chew cud from the stomach chambers to aid digestion. Giraffes are the tallest mammal, capable of reaching 18 feet in height, and typically live about 25 years in the wild. Males tend to be nomadic, coming and going from small groups of female giraffes for mating, and otherwise tend to prefer a bachelor lifestyle. When males converge on receptive females, they engage in a fight behavior called necking, swinging their massive necks and striking each other with their horns, or ossicones, to subdue and defeat opponents. Females have a gestation of up to 15 months, and calves are born six feet tall and weigh 220 pounds; after falling seven feet from the mother during birth, they are on their feet in less than an hour. Each giraffe is born with a unique skin pattern, and the reticulated giraffe has the most colorful and distinctive markings of the nine subspecies. Because of their enormous size, giraffes have few natural predators, though they may fall victim to lions, hyenas, and crocodiles, and they are equipped with a deadly kick capable of killing attackers. Their true threat is humans, as poachers harvest giraffes for their hair, skin, and meat.