Category Archives: South African Wildlife

The inhabitants of South Africa’s wild places

Tsessebe

Damaliscus lunatus lunatus

The Tsessebe is considered to be Africa’s most athletic antelope, though you would probably not immediately guess that when looking upon their ungainly physiques for the first time. Not only are they the fastest antelope (up to 80km/h), but they have tremendous stamina, being able to maintain a speed of 60km/h over distances of up to 5km.

Tsessebes are large antelopes, much larger than their close cousin the Blesbok, weighing in at an average of 140kg and standing up to 1.3m high at the shoulder. Bulls have thicker horns than cows.

These fleet-footed antelope live in open woodlands, lightly wooded and open grasslands and flood plains, where they require easy access to drinking water and shade. They subsist almost exclusively on grass and are especially attracted to new growth sprouting after veld fires.

Tsessebes are territorial animals. In areas with low population density they live in stable herds consisting of a single territorial bull, 2 to 6 cows and their dependent calves with large home ranges, while in more densely populated areas, specifically during the rutting season, bulls establish small territories into which they try to herd traversing cows for mating. Solitary bulls and bachelor groups also occur, and move along the edges of the territories. Territories are maintained through ritual displays (including horning the ground) and fighting, and demarcated with scent glands and dung heaps by both sexes. They are normally found in small herds of up to eleven animals, but can at times congregate in huge numbers when conditions are favourable. Herds are lead by the most dominant cow. Tsessebes often associate with other herbivorous animals, regularly occurring in mixed herds with waterbuckwildebeest, zebras and ostriches. They are very curious and will even approach something unknown for a closer look, or when fleeing run away for only a short distance before turning around to check up on what frightened them, often with deadly consequences for the tsessebe.

Single calves are born at the onset of the rainy season after a gestation of around 240 days, and are able to keep up with the herd shortly after birth. Females can stay in the same group their entire lives, but young bulls are driven from their maternal herd at about a year of age. Tsessebe and their calves feature on the menu of all Africa’s medium to large predators, and have a natural life expectancy of about 12 years.

Africa is home to five different races of Tsessebe, also called Topi, Korrigum and Tiang according to the subspecies they belong to, numbering an estimated 300,000. The IUCN estimates the total population of the southern race of Tsessebe (D.l. lunatus) at around 30,000, with the overall population increasing steadily despite pressures from habitat loss. They are rare in South Africa, though numbers are increasing, with small populations being protected in the KrugerMarakele, Mokala and Pilanesberg National Parks, iSimangaliso Wetland Park and Ithala Game Reserve.

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Blesbok

Damaliscus pygargus phillipsi

The Blesbok is a medium-sized antelope endemic to South Africa’s central plains. They have a shoulder height just short of 1m and weigh around 70kg. The “bles” in their name refers to the striking white blaze on their faces. White Blesbok have a leucistic coat and are mainly selectively bred on game ranches.

The Blesbok naturally occurs only on the open grasslands of South Africa’s Highveld, where they are well adapted to the cold winters, though they have been introduced to farmland in the more densely wooded Bushveld and drier Karoo regions as well with varying success. Their diet consists almost exclusively of short grasses and require daily access to a supply of fresh drinking water.

Blesbok form large mixed herds during winter, but at the onset of the summer the rams will start establishing small territories, demarcated with scent glands and dung heaps, advertised through ritualised displays and maintained through some serious fighting, in which they attempt to herd and keep groups of ewes with which to mate. Blesbok are diurnal animals, resting during the heat of the day by positioning themselves with lowered heads facing the sun. Blesbok are fast runners with great stamina. When moving, herd members follow each other in a straight line, even when fleeing from predators.

Ewes give birth to single lambs, usually in the summer months, and will nurse only their own lambs. Lambs are capable of running with the herd within 20 minutes of birth, and are preyed upon by jackals, caracals and feral dogs. Most of Africa’s large predators have been exterminated from the Blesbok’s range. They have a life expectancy of up to 17 years in the wild.

The Blesbok once occurred in enormous numbers on the Highveld of South Africa, but excessive hunting led to the population plummeting to a low of about 2,000 at the end of the 19th century. Their numbers have since been built back up, but not nearly to erstwhile levels, with the IUCN estimating a population of approximately 240,000, most of which occur on private land where they are a popular game ranching animal as they can be contained by standard stock fencing. Golden Gate Highlands National Park, Rietvlei Nature Reserve and Willem Pretorius Game Reserve are good places to go searching for Blesbok.

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Black Wildebeest

Connochaetes gnou

With their long white tails, stiff mane, whiskery muzzles, and curved, forward facing horns the Black Wildebeest looks quite menacing and is easily recognisable. Bulls have a shoulder height of only 1.2m and weigh in at around 160kg, considerably smaller than their closely related cousins, the Blue Wildebeest.

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An inhabitant of open grasslands and semi-desert plains, Black Wildebeest subsists on a diet of grass, low shrubs and succulents, and need to drink daily. They have a preference for highlands and mountain plateaus, and are quite resistant to the extreme cold experienced in such habitats, especially during winter.

Black Wildebeest are gregarious animals, coming together in herds of 6 to 60 made up mostly of cows and calves traversing the territories of bulls in their prime. Bulls unable to hold territories of their own join together in bachelor groups. During the hot summer they are mostly active from early evening to early morning, while they are active for most of the daylight hours in winter. As their open habitat usually offers very little in the form of shade, they spend the hottest hours of the day standing still and facing away from the sun. Black Wildebeest are extremely nervous, taking flight at high speed at the scantest sign of danger, and can be aggressive and unpredictable, especially when cornered, which is why you’ll seldom see them in captivity – as recently as 2013 a farmer and his son were killed when the family was attacked by two black wildebeest.

Cows give birth in the herd to single calves between November and January. The calves can keep up with the herd within minutes of being born. Most of the larger predators have been wiped out in the black wildebeest’s range and as such black-backed jackals preying on calves were the biggest predatory threat to them, though recently lion and cheetah have been reintroduced to some reserves where they occur and should re-establish a natural predator-prey balance. Their natural life expectancy is about 16 years.

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The Black Wildebeest occurs naturally only in South Africa, Lesotho and Swaziland. In times past the Black Wildebeest was a migrating species, moving seasonally between the moist highveld grasslands and dry Karoo in incredible numbers, but modern farming practices have made such large scale movements impossible and the species is now confined to fenced farms and reserves. Some of the best places to see them include Chelmsford Nature Reserve, Golden Gate Highlands National Park, Mountain Zebra National Park and Willem Pretorius Game Reserve. By the end of the 19th century indiscriminate hunting had almost driven the species to extinction, but since then concerted conservation efforts have ensured that numbers have been built up to an estimated 18,000 on private land and in state conservation areas, and the IUCN now considers their populations to be safe and increasing. That being said, hybridisation with the closely related Blue Wildebeest is an increasing threat to the genetic purity of the Black Wildebeest.

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Blue Wildebeest

Connochaetes taurinus taurinus

The Blue (or Common) Wildebeest must be one of Africa’s most familiar antelope, although it will probably never be included in a list of the continent’s most elegant creatures. Bulls stand around 1.5m high at the shoulder, and weigh about 240kg, while cows are more lightly built at around 180kg.

Blue wildebeest inhabit open grasslands, savannas and semi-deserts, where they subsists almost exclusively on short grasses and require a reliable supply of water, even in arid regions.

These diurnal herbivores congregate in herds of up to 10,000 (but mostly much smaller – a few dozen or so), consisting mostly of cows and calves traversing the territories of mature bulls. Smaller bachelor herds made up of bulls unable to maintain a territory of their own also occur. They will cover enormous distances trekking after fresh grazing and water. Blue wildebeest are commonly found associating with other game species, especially impala, giraffes and plains zebras, and have a curious love for rolling in mud and dung!

Calves are born in the herd at the onset of the rainy season and can walk within 10 minutes of birth. Blue wildebeest have an expected life span of around 15 years, fall prey to all Africa’s large predators and also suffer from several parasites and sicknesses.

In South Africa, Blue Wildebeest can be found in all of the northern provinces, though mostly confined to national parks, nature reserves and game ranches. Large populations can be found in Kruger National Park, Hluhluwe-Imfolozi Park, Pilanesberg National Park, Kgalagadi Transfrontier Park, Ithala Game Reserve and uMkhuze Game Reserve. The IUCN considers the Common Wildebeest (C. taurinus) to be of least concern in conservation terms, estimating the total population at around 1,5-million, of which 130,000 belong to the southern subspecies, the Blue Wildebeest (C. t. taurinus).

A unique colour-variation of the Blue Wildebeest, known as the Golden Wildebeest, is sometimes seen on game ranches.

Crimson-breasted Shrike

Laniarius atrococcineus

The Crimson-breasted shrike is a small (53g, 25cm) insectivorous bird native to the drier north-western regions of South Africa and neighbouring Botswana, Namibia and Zimbabwe, where it can be found in thorny savanna thickets. They are monogamous and pairs defend a territory throughout the year, though breeding occurs mainly in the summer months. They build their nests of bark and spiderwebs.

The striking scarlet, black and white plumage of the Crimson-breasted Shrike is a perfect fit for this week’s WordPress Photo Challenge “Vibrant“.

Black Heron

Egretta ardesiaca

One of the most interesting birds you could hope to see in action in South Africa’s wild places, is the Black Heron. It’s a smallish species, about 55cm long and less than 350g in weight. Their black plumage and bright orange-yellow feet make them easily recognisable.

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Black Herons roost and breed communally in reedbeds or trees, near or over water, with others of their own species, and other kinds of egrets, herons, cormorants and ibises. Nests are platforms built of twigs at the start of the rainy season, on which clutches of 2 to 4 eggs are incubated.

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They search for food, alone or in flocks of varying sizes, in rivers, swamps, lakes and estuaries, and feed predominantly on fish.

Black Heron

Black Herons occur widely in Sub-Saharan Africa, excluding the equatorial forests, The IUCN considers the species’ population stable and in no immediate danger of extinction, though they are highly threatened in Madagascar.

Black Heron (8)

A recent visit to Austin Roberts Memorial Bird Sanctuary afforded us the opportunity to enjoy up-close views of the Black Heron’s characteristic hunting method, knows as “canopy feeding“. The bird uses its wings to create an umbrella around its head, and then picks off fish and tadpoles beneath. This behaviour may serve a dual purpose of preventing glare from the water, making it easier to see their prey, and tricking the prey into thinking that the shadow is a safe hiding place. They are also known to wiggle their toes underwater to attract their fishy prey.

Heavyweights

Wide load ahead! African elephants laying claim to the road…

Weight(less)” is the theme for this week’s WordPress Photo Challenge.

Circle

The unusual posterior markings of the waterbuck is an ideal fit for this week’s WordPress Photo Challenge “Circle“!

 

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Cheetah on the lookout, Gudzani Road

Cheetah

Acinonyx jubatus

Cheetah (2)

Few animals’ anatomy so clearly describes their way of life as that of a cheetah. With a small head, big chest, long legs, a supple back and a tail used as a rudder that enables it to change direction in a split second, the cheetah is absolutely built for incredible speed.

Cheetahs inhabit areas of open grasslands, bushveld and semi-deserts. Here they prey mostly on small and medium sized antelope, but also on rabbits, jackals and birds up to the size of kori bustards and ostriches. They are independent of water, but will drink when it is readily available.

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Cheetahs are diurnal cats, being most active in the early morning and late afternoon, resting up in shady vantage areas during the heat of the day. Both sexes mark and defend large territories, those of females usually being bigger in size than the males’. Females are solitary, except when accompanied by their cubs or a male suitor, while adult males often form coalitions of 2 or more that band together to defend a territory. While hunting and patrolling their territory, cheetahs will readily take to trees, termite mounds and small hills to scan their surroundings. Cheetahs are most famous for being the fastest mammals on the planet, capable of reaching speeds of 100km/h, which they can only maintain for a relatively short distance of 300 to 400m, in pursuit of prey. After such a chase, the cheetah normally takes a few minutes to catch its breath before feeding hastily, as other predators, even vultures and baboons, will rob them of their meal.

Cheetah females give birth to up to 6 cubs at a time. The cubs are hidden in long grass, thickets or rocky outcrops for the first month or two of their lives. They are weaned from as early as 3 months old and the female starts training them to hunt from about 4 months of age. The cubs become independent of their mother between 12 and 20 months after birth, at which time they are forced from her territory. The newly independent cubs roam widely and often have a difficult time of it, until they are successful in establishing a territory of their own. Lions, leopards and spotted hyenas are known to actively hunt and kill cheetahs, and they are susceptible to a variety of diseases. In some populations as few as 5% of cubs reach independence. In the wild, cheetahs live to between 10 and 16 years of age.

Orpen cheetah sighting

Orpen cheetah sighting

The King Cheetah is a beautiful and rare recessive genetic mutation of the cheetah in which the spots are fused into blotches and stripes. Seeing a King Cheetah in the wild occurs very rarely but there are a handful in captivity.

The 4th of December annually is commemorated as International Cheetah Day, to highlight the plight of these lithe big cats. The IUCN considers the cheetah vulnerable to extinction, with a total population of aproximately 7,500 which is believed to be decreasing further. They are threatened by habitat loss, the eradication of their prey base, conflict with livestock farmers and illegal hunting, and have seen tremendous declines in their distribution range. In South Africa wild cheetahs now probably number around 550 animals only, with a considerable percentage of this population persisting outside the big conservation areas in places where competition with larger predators are less of a threat. In our experience, the Hluhluwe-Imfolozi Park, Kruger National Park and Kgalagadi Transfrontier Park provides the best opportunities for encounters with wild cheetahs in South Africa.

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Common Impala

Aepyceros melampus melampus

The impala is a familiar sight in many of South Africa’s reserves and national parks, and often so numerous that most visitors do not give them more than a passing glance, which is a huge pity. They are medium sized antelope, standing around 90cm high at the shoulder and weighing between 40 and 80kg. The rams are bigger than the ewes and only they carry the beautifully shaped horns.

The Black-faced Impala, a seperate subspecies (A.m.petersi), occurs in Northern Namibia.

Impalas occur in fairly dense woodland and bushveld, especially where acacias and mopane trees are dominant, and reach their highest population densities in riverine vegetation. They are mixed feeders, including large amounts of grass and browse in their diet, with considerable variation in the plants they feed on during the different seasons. They prefer to drink daily and access to a reliable water source is an important habitat factor for impala – they’re seldom further than 2 or 3km from water.

Outside the mating season, impalas occur in large, mixed herds of up to 300 animals. In the mating season, adult rams (between 4 and 8 years old) establish territories in which they herd harem groups of about 20 ewes and lambs that they defend vigorously from the attentions of any other males. During this time, males that cannot successfully demarcate a territory or hold on to their harems will band together in bachelor groups.

Impalas are most active in the early morning and afternoons, and sometimes into the night. During the heat of the day they rest up in thickets or shade near water, at night they sleep in open areas. Impala herds do not have large home ranges and they often associate with other herbivores, most notably zebras, giraffes, kudus, blue wildebeest and monkeys and baboons. They’re extremely athletic, capable of speeds in excess of 60km/h and leaps 3m high and 12m far.

In South Africa, the impala mating season falls in autumn, with most of the lambs arriving en masse in early summer. Ewes give birth to single lambs in thickets or long grass, to rejoin the herd with their lamb after two days. Almost all the lambs in a herd are born within a few days of each other, ensuring that there are more lambs than predators can handle. In the herd, the lambs group together in nurseries watched over by one or two ewes.

Impalas are a staple of many of Africa’s large predators, especially cheetah, leopard, wild dog and crocodiles. Lambs are also taken by eagles, pythons, jackals and baboons. Owing to their dependence on drinking water and reluctance to move over longer distances, impala suffer greatly during prolonged droughts. They have a life expectancy of between 8 and 15 years in the wild.

In South Africa, the common impala’s natural distribution stretches across the Kwazulu-Natal, Mpumalanga, Limpopo and North West Provinces, and they are frequently encountered in the Hluhluwe-Imfolozi Park, uMkhuze Game Reserve, Ithala Game Reserve, Tembe Elephant ParkKruger National Park, MapungubweMarakele and Pilanesberg National Parks. The IUCN considers the common impala’s conservation status to be secure, with a stable population estimated at about 2 million, half of which occurs on private land, often outside their natural distribution range, being a popular game ranching animal.

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Uniquely coloured impalas appear from time to time in natural populations, and on game ranches these are often purposefully bred.