Sulcata Tortoise

The African spurred tortoise (Centrochelys sulcata), also called the sulcata tortoise, is an endangered species of tortoise inhabiting the southern edge of the Sahara Desert, the Sahel, in Africa. It is the largest mainland species of tortoise in Africa, and the third-largest in the world, after the Galapagos tortoise and Aldabra giant tortoise. It is the only living species in its genus, Centrochelys.

The African spurred tortoise is native to the Sahara Desert and the Sahel, a transitional ecoregion of semiarid grasslands, savannas, and thorn shrublands found in the countries of Burkina Faso, the Central African Republic, Chad, Eritrea, Ethiopia, Mali, Mauritania, Nigeria, Senegal, Saudi Arabia, Sudan, Yemen and possibly in Somalia, Algeria, Benin, and Cameroon. It is possibly extirpated from Djibouti and Togo. They are found on hills, stable dunes, and flat areas with shrubs and high grass. They also like to settle in areas with interrupted streams or rivers. In these arid regions, the tortoise excavates burrows in the ground to get to areas with higher moisture levels, and spends the hottest part of the day in these burrows. This is known as aestivation. In the wild, they may burrow very deep, up to 15 m deep and 30 m long. Plants such as grasses and succulents grow around their burrows if kept moist, and in nature they continue to grow for the tortoise to eat if the soil is replenished with its feces. Sulcata tortoises found in the Sudanese part of their range may reach significantly greater size at maturity than those found in other regions.

Sulcata tortoises are mostly herbivores. Primarily, their diets consist of many types of grasses, plants (especially succulent plants), and hay. Their overall diet should be high in fiber and very low in protein. Too much protein will lead to the tortoise growing too fast, which can result in metabolic bone disease, a condition that is characterized by distortion of the skeleton and weakened bone structure and can lead to lameness, lower quality of life, and/or shortened lifespan. Flowers and other plants including cactus pads can be consumed. In the wild, they have been observed to also eat plants and algae off the surface of the water. African spurred tortoises are also capable of eating various vegetables such as endive, dandelion greens, and dark leafy greens. Despite being herbivores, they will occasionally eat the carcasses of dead animals. They mostly eat dead goats and zebras that have been pushed downstream during the wet season on the rivers and streams next to which tortoises settle. If a human settlement is nearby they will also feed on refuse.