As well as the classic 'Big Five', the region’s remarkable wildlife includes several rare species — known as the Samburu ‘Special Five’. Grevy’s zebra is distinguished by its larger size, tighter stripes, big round ears and light brown muzzle, while Samburu's reticulated giraffe is slightly shorter than its Maasai cousin, with striking polygon-shaped spots. The beisa oryx is notable for its long, straight horns and bold black facial markings; and the gerenuk is often referred to as a ‘giraffe gazelle’ for its ability to stand on its hind legs to feed from trees and higher bushes. Completing the set is the Somali ostrich, easily recognised by its blue-grey skin and legs.