Addax nasomaculatus (de Blainville, 1816).

This is a large antelope; 110-130 cm long and 95-115 cm high at the shoulder. It is characterized by distinctive white markings on the face, ears, and belly, while the general color is pale in summer becoming darker in winter. Both male and female have long (65 cm or more) slender horns in an open spiral. The wide hooves with flat soles allow it to move easily on the soft sand of its desert habitat. The Addax is active from dusk to dawn. It feeds on desert grasses and spends most of its life without drinking as it receives sufficient water from its food. The gestation period is eight and a half months and a single calf is born. Endangered throughout its range; the addax has become extinct in Egypt during the last 100 years.