The leopard tortoise (''Stigmochelys pardalis'') is a large and attractively marked

tortoise Tortoises ( ) are reptiles of the family Testudinidae of the order Testudines (Latin for "tortoise"). Like other turtles, tortoises have a shell to protect from predation and other threats. The shell in tortoises is generally hard, and like o ...

found in the

savanna A savanna or savannah is a mixed woodland-grassland (i.e. grassy woodland) biome and ecosystem characterised by the trees being sufficiently widely spaced so that the canopy does not close. The open canopy allows sufficient light to reach th ...

s of eastern and southern Africa, from

Sudan Sudan, officially the Republic of the Sudan, is a country in Northeast Africa. It borders the Central African Republic to the southwest, Chad to the west, Libya to the northwest, Egypt to the north, the Red Sea to the east, Eritrea and Ethiopi ...

to the southern

Cape Province The Province of the Cape of Good Hope (), commonly referred to as the Cape Province () and colloquially as The Cape (), was a province in the Union of South Africa and subsequently the Republic of South Africa. It encompassed the old Cape Co ...

. It is the only extant member of the genus ''Stigmochelys'', although in the past, it was commonly placed in '' Geochelone''. This tortoise is a grazing species that favors semiarid, thorny to grassland habitats. In both very hot and very cold weather, it may dwell in abandoned fox, jackal, or

aardvark Aardvarks ( ; ''Orycteropus afer'') are medium-sized, burrowing, nocturnal mammals native to Africa. Aardvarks are the only living species of the family Orycteropodidae and the order Tubulidentata. They have a long proboscis, similar to a pi ...

burrows. The leopard tortoise does not dig other than to make nests in which to lay eggs. Given its propensity for grassland habitats, it grazes extensively upon mixed grasses. It also favors succulents and

thistle Thistle is the common name of a group of flowering plants characterized by leaves with sharp spikes on the margins, mostly in the family Asteraceae. Prickles can also occur all over the planton the stem and on the flat parts of the leaves. T ...

Taxonomy and etymology

The phylogenic placement of the leopard tortoise has been subject to several revisions. Different authors have placed it in ''Geochelone'' (1957), ''Stigmochelys'' (2001), ''Centrochelys'' (2002), and ''Psammobates'' (2006). More recently, consensus appears to have settled on ''Stigmochelys'', a monotypic genus. Considerable debate has occurred about the existence of two subspecies, ''S. p. pardalis'' and ''S. p. babcocki'', but recent work does not support this distinction. ''Stigmochelys'' is a combination of Greek words: ''stigma'' meaning "mark" or "point" and ''chelone'' meaning "tortoise". The specific name ''pardalis'' is from the Latin word ''pardus'' meaning "leopard" and refers to the leopard-like spots on the tortoise's shell.

Description

The leopard tortoise is the fourth-largest species of tortoise in the world, with typical adults reaching and weighing . Adults tend to be larger in the northern and southern ends of their range, where typical specimens weigh up to , and an exceptionally large tortoise may reach and weigh . The

carapace A carapace is a dorsal (upper) section of the exoskeleton or shell in a number of animal groups, including arthropods, such as crustaceans and arachnids, as well as vertebrates, such as turtles and tortoises. In turtles and tortoises, the unde ...

is high and domed with steep, almost vertical sides. Juveniles and young adults are attractively marked with black blotches, spots, or even dashes and stripes on a yellow background. In mature adults, the markings tend to fade to a nondescript brown or grey. The head and limbs are uniformly colored yellow, tan, or brown.

Distribution and habitat

They are widely distributed across the arid and savanna regions of eastern and southern Africa, extending from

South Sudan South Sudan (), officially the Republic of South Sudan, is a landlocked country in East Africa. It is bordered on the north by Sudan; on the east by Ethiopia; on the south by the Democratic Republic of the Congo, Uganda and Kenya; and on the ...

and Somalia, across

East Africa East Africa, also known as Eastern Africa or the East of Africa, is a region at the eastern edge of the Africa, African continent, distinguished by its unique geographical, historical, and cultural landscape. Defined in varying scopes, the regi ...

, to

South Africa South Africa, officially the Republic of South Africa (RSA), is the Southern Africa, southernmost country in Africa. Its Provinces of South Africa, nine provinces are bounded to the south by of coastline that stretches along the Atlantic O ...

and

Namibia Namibia, officially the Republic of Namibia, is a country on the west coast of Southern Africa. Its borders include the Atlantic Ocean to the west, Angola and Zambia to the north, Botswana to the east and South Africa to the south; in the no ...

. The species is generally absent from the humid forest regions of

Central Africa Central Africa (French language, French: ''Afrique centrale''; Spanish language, Spanish: ''África central''; Portuguese language, Portuguese: ''África Central'') is a subregion of the African continent comprising various countries accordin ...

. Over this range, the leopard tortoise occupies the most varied habitats of any African tortoise, including grasslands, thorn-scrub, mesic brushland, and savannas. They can be found at altitudes ranging from sea level to .

Ecology and behavior

Leopard tortoises are

herbivorous A herbivore is an animal anatomically and physiologically evolved to feed on plants, especially upon vascular tissues such as foliage, fruits or seeds, as the main component of its diet. These more broadly also encompass animals that eat n ...

; their diet consists of a wide variety of plants including forbs, thistles, grasses, and succulents. They consume berries and other fruits when available. They sometimes gnaw on bones or even ash and hyena feces to obtain calcium, necessary for bone development and their eggshells. Seeds can pass undigested through the gut, so the leopard tortoise plays a significant role in seed dispersal. Normally active during the day, they are less active during hot weather or during the dry season. The leopard tortoise reaches sexual maturity between 12 and 15 years old, and may live as long as 80 to 100 years. During the mating season, males fight over females, ramming and butting their competitors. They trail after females for quite some distance, often ramming them into submission. When mating, the male makes grunting vocalizations. Nesting occurs between May and October when the female digs a hole and lays a clutch of five to 30 eggs. As many as five to seven clutches may be laid in a single season. Incubation takes 8–15 months depending on temperature. The numerous predators of the eggs and hatchlings include monitor lizards, snakes, jackals, and crows. Adults have few natural predators, but lions and hyenas have occasionally been reported preying on them.

Conservation

The leopard tortoise is a widespread species and remains common throughout most of its range. Human activities, including agricultural burning, consumption, and especially commercial exploitation in the pet trade, are potential threats, but have not yet caused significant population declines. They are increasingly being bred in captivity for the pet trade. For example, most tortoises exported from Kenya and Tanzania originate in captive-breeding programs, alleviating collection from the wild. The leopard tortoise has been listed in Appendix II of CITES since 1975, and in 2000, the United States banned their import because of the risk posed by heartwater, an infectious disease carried by tortoise ticks that could seriously impact the US livestock industry.

Gallery

File:Geochelone pardalis00.jpg, One-month-old hatchling Leopard tortoise (Stigmochelys pardalis) juvenile.jpg, Juvenile Image:Tortoise closeup.jpg, Small 20-year-old leopard tortoise eating File:Geochelone pardalis02.jpg, Retracted fore legs of adult female leopard tortoise File:Stigmochelys pardalis05.jpg, Close-up of scutes File:Geochelone pardalis 1.jpg, Three adult leopard tortoises File:Leopard Tortoise.JPG, Mature adult (faded) File:Stamp of Azerbaijan 324.jpg, Leopard tortoise on

Azerbaijan Azerbaijan, officially the Republic of Azerbaijan, is a Boundaries between the continents, transcontinental and landlocked country at the boundary of West Asia and Eastern Europe. It is a part of the South Caucasus region and is bounded by ...

stamp File:Geochelone pardalis01.jpg, Three baby leopard tortoises File:Leopard tortoise digging hole.jpg, Leopard tortoise digging a hole to lay eggs File:Leopard tortoise laying eggs.jpg, Leopard tortoise laying eggs File:Leopard tortoise closing hole.jpg, Leopard tortoise closing hole with eggs in

References

External links

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IUCN/SSC Tortoise and Freshwater Turtle Specialist Group
{{Authority control Stigmochelys Turtles of Africa Reptiles of Southern Africa Fauna of East Africa Reptiles described in 1828 Taxa named by Thomas Bell (zoologist) Articles containing video clips