The scimitar oryx (Oryx dammah), also known as the scimitar-horned oryx and the Sahara oryx, is an Oryx species that was once widespread across North Africa and parts of West and Central Africa. In 2000, it was declared extinct in the wild on the IUCN Red List, but in 2023, it was downlisted to endangered, with a reintroduced population in Chad. This particular oryx is adapted to harsh desert conditions and can survive for months without drinking water. A grazing animal, it derives most of its daily moisture intake from plants.
The decline of the scimitar oryx population began as a result of climate change during the Neolithic period, and later it was hunted extensively for its horns. Today, it is bred in captivity in special reserves in Tunisia, Morocco, and Senegal, and on private exotic animal ranches in the Texas Hill Country, United States. In 2016, a reintroduction program was launched, and currently a small herd has been successfully reintroduced in Chad.
The scimitar oryx was the emblem of the ancient Egyptian Oryx nome and today is the animal symbol of the Sahara Conservation Fund.
The habitat of scimitar oryxes in the wild is steppe and desert, where they eat foliage, grass, herbs, shrubs, succulent plants, legumes, juicy roots, buds, and fruit. They can survive without water for 9-10 months because their kidneys prevent water loss from urination – an adaptation to desert habitats. They can get water from water-rich plants such as the wild melon (Citrullus colocynthis) and Indigofera oblongifolia and from the leafless twigs of Capparis decidua. In the night or early morning, they often search for plants such as Indigofera colutea, which produce a hygroscopic secretion that fulfills water requirements. They eat tuft grasses such as Cymbopogon schoenanthus after rains, but they normally prefer more palatable grasses, such as Cenchrus biflorus, Panicum laetum, and Dactyloctenium aegyptium. When the dry season begins, they feed on the seedpods of Acacia raddiana and during the dry season, they rely on perennial grasses of genera such as Panicum (especially Panicum turgidum) and Aristida and browse plants such as Leptadenia species, Cassia italica, and Cornulaca monacantha.
The scimitar oryx once inhabited grassy steppes, semideserts] and deserts in a narrow strip of central north Africa (especially in Niger and Chad). It was widespread on the fringes of the Sahara, mainly in subdesert steppe, the grassy zone between the real desert and the Sahel, an area characterized by an annual rainfall of 75–150 mm (3.0–5.9 in). In 1936, a single herd of 10,000 scimitar oryxes was seen in the steppe area of Chad. By the mid-1970s, Chad was home to more than 95% of the world population of this species.
Following the Neolithic Subpluvial, around 7500 to 3500 BC, the "green Sahara" became dry and the scimitar oryx's population began to decline due to a loss of suitable habitat. This was further exacerbated by humans who hunted the scimitar oryx for both its meat and horns. The northern population was already almost lost before the 20th century. With the introduction of horses and firearms during the 20th century, nomadic hunters were able to decimate populations. The decline of the southern population accelerated as Europeans began to settle the area and hunt them for meat, hides, and horn trophies.
