Giraffe up to , and can sustain for several kilometres. A giraffe rests by lying with its body on top of its folded legs. To lie down, the animal kneels on its front legs and then lowers the rest of its body. To get back up, it first gets on its knees and spreads its hind legs to raise its hindquarters. It then straightens its front legs. With each step, the animal swings its head. In captivity, the giraffe sleeps intermittently around 4.6 hours per day, mostly at night. It usually sleeps lying down, however, standing sleeps have been recorded, particularly
Reticulated giraffe Rothschild's giraffe or reticulated giraffe herds. The San Diego Zoo Safari Park, Bronx Zoo, and Chester Zoo have herds of just Rothschild's giraffe. Cheyenne Mountain Zoo, Busch Gardens Tampa, The Maryland Zoo, and Omaha's Henry Doorly Zoo all have strictly reticulated giraffe herds. However, some zoos still breed Rothschild's giraffe and reticulated giraffes. At Utah's Hogle Zoo, their giraffe herd consists of male Riley, a reticulated giraffe, and females Kipenzi, a reticulated giraffe, and Pogo, a Rothschild's giraffe. In early 2016, Willow was born to Riley and Pogo. According to the new research discovered in 2016, Willow would be a