Category Archives: South African Wildlife

The inhabitants of South Africa’s wild places

African Bullfrog

Pyxicephalus edulis

While I doubt it reached proportions that would convince the Pharaoh to allow the Israelites to leave Egypt, the “eruption” of little froglets we saw at uMkhuze Game Reserve during our recent visit was quite fascinating. Rain or shine, literally hundreds (if not more) of tiny frogs could be seen jumping around on the roads all over the reserve, making driving quite tricky if you didn’t want to squash them under the vehicle’s wheels.

Thanks to the help of the iSimangaliso Wetland Park the little ones were identified as juvenile African Bullfrogs (also known as Edible or Lesser Bullfrogs), a species that occurs over wide areas of Eastern, Central and Southern Africa, and indeed is eaten by humans in many countries where they occur. Though these newly metamorphosed juveniles were only about the size of a thumbnail, the African Bullfrog can grow to 12cm in length.

African Bullfrog

They can be found in seasonally flooded savannas and grassy woodlands, remaining dormant underground for most of the year (up to 10 months) and emerging only when sufficient rain has fallen for breeding to commence. During the breeding season males act very aggressively towards one another and will even kill each other. Eggs are laid in well vegetated, shallow, seasonal bodies of water where the males guard the eggs and tadpoles against other males and predators. Interestingly, when the tadpoles’ pools start drying up the males will dig channels to deeper pools. African Bullfrogs feed on a variety of invertebrates and small vertebrates, including other frogs, and feature in turn in the diets of various species of birds, reptiles and mammals (humans included).

During a visit to the Kruger National Park in December 2019 we witnessed the breeding habits of the African Bullfrog following a few days of continuous rain.

 

White Stork

Ciconia ciconia

Everyone will quickly recognise the White Stork as the legendary bird responsible for the delivery of newborn babies. These large, strikingly pied birds stand over a metre tall, has a wing span of up to 2 metres and weighs as much as 4kg.

White Storks migrate in enormous flocks (numbering hundreds or even thousands) from Europe, North Africa and Western Asia to Sub-Saharan Africa to spend the summer in our warm weather, the first birds arriving around September and the last departing again by April or May. At those times they are a regular sight in savannas, grasslands and cultivated fields right across South Africa, often close to water, feeding in flocks usually numbering from 10 to 50, though larger groups of several hundred are not uncommon. White Storks are diurnal in habit, roosting communally at night. They feed mainly on insects (but also rodents, reptiles and frogs), and often take advantage of fires to catch prey escaping the flames. Only a handful of pairs breed here, and only in the Western Cape. Nests are constructed of sticks in high trees or on top of buildings or other man-made structures, and often used for several consecutive years, even decades. As the nests are continuously expanded they can become quite huge over time, and are often shared by other kinds of birds. Pairs will build their nests in isolation or in loosely associated small colonies of up to 30 pairs. Up to 7 (more usually 4) eggs are laid and incubated for 33 days or so by both parents. The chicks stay in the nest for about two months after hatching.

The IUCN estimates the White Stork’s total global population at about 700,000 and growing, and considers them to be of least concern in conservation terms. The use of agricultural pesticides and subsequent poisoning, electrocution by overhead powerlines and habitat destruction are considered major local threats to the White Stork.

African Spoonbill

Platalea alba

The African Spoonbill is a large wading bird (90cm long, weighing up to 1.8kg) with a characteristic spoon-shaped beak.

They can be found at shallow bodies of freshwater – natural and man-made lakes, pans, rivers, marshes, floodplains, estuaries and even sewerage works – where they feed on small fish and aquatic invertebrates caught by moving their bills sideways through the water. Spoonbills can often be seen close to hippos and crocodiles, hoping that these large animals will flush something edible. Breeding is timed to start just before or during the rains. They nest colonially in trees, reedbeds or on rocky islands and ledges, usually in groups numbering from 5 to 250 or more monogamous pairs and often together with other species of waterbirds as well. The nests are platforms built of sticks and reeds in which 3 to 5 eggs are incubated for around 4 weeks by both parents.

The African Spoonbill has a wide distribution and stable population, and is considered of least concern by the IUCN. They occur over almost all of South Africa with the exception of the arid northwestern corner of the country, and further range over most of Sub-Saharan Africa (except the equatorial forests) and Madagascar.

Hadeda Ibis

Bostrychia hagedash

One of South Africa’s best known, most common, and most widely occurring bird species, the Hadeda is a large ibis weighing up to 1.5kg. Few South Africans would not be familiar with their distinctive “ha-ha-ha-de-dah” call.

Hadedas are mostly sedentary, and some have been known to use the same roosts for many years. By day they forage in pairs or small groups along wooded streams and in suitable man-made habitats (like irrigated fields, garden lawns and golf courses) for their invertebrate staple diet (chiefly worms, snails and slugs, endearing them to gardeners), which they locate by probing in the soft earth and leafy detritus with their long, curved bills. Unlike many other ibis species, Hadedas nest in solitary pairs during or just after the rainy season. Three or four eggs are laid in nests usually used for many consecutive breeding seasons and constructed of sticks and twigs on a level tree branch (or similarly suitable man-made structure), often over water. Both adults take turns to incubate the eggs. Traditional healers use the ground-up bones of Hadedas to prepare a potion said to prevent love partners from leaving with someone else, a belief based in the Hadeda’s enduring monogamous associations.

The Hadeda has an expanding population distributed over most of Sub-Saharan Africa, and is considered of “Least Concern” by the IUCN. They are a common sight all over urban South Africa, which has aided their rapid range expansion, and in most nature reserves.

Glossy Ibis

Plegadis falcinellus

The Glossy Ibis is a rather small ibis (weighing between 500 and 750g with a wingspan of a metre or less), occurring in shallow wetlands, lagoons, estuaries, swamps and flooded meadows, rice paddies and sewerage works. Here they feed mostly on aquatic invertebrates (insects, worms, molluscs, crustaceans, etc) and only occasionally on vertebrates like fish and frogs.

Most breeding takes place just before or during the rainy season. Glossy Ibis nest in colonies, usually consisting of between 5 and 100, but often thousands, of monogamous pairs, and often together with other waterbirds. The nests are platforms constructed from twigs, usually just slightly above the waterline in trees or other emergent vegetation standing in wetlands. Females normally lie three to five eggs that are incubated by both parents for around three weeks. Nestlings fledge a month after hatching but are fed by the parents for up to 2 months. Once the breeding season comes to an end, individuals become nomadic and range widely.

The Glossy Ibis has an enormously wide distribution, and can be found in North and South America, the Caribbean, Europe, Asia, Australia and most of Africa and the Indian Ocean islands, except the driest deserts and equatorial forests. In South Africa they are absent only from the driest portions of the Northern Cape Province. The IUCN estimates that there may be as many as 2.3-million of these birds on earth, and though some populations are declining (due mostly to loss of their wetland habitat) considers them to be of Least Concern in conservation terms.

Leopard

Panthera pardus

The beautiful Leopard is at the top of the wishlists of many visitors to South Africa’s wild places, and certainly deserves its position among Africa’s “Big Five“. One of the most adaptable of the large carnivores, their build and colouration is supremely attuned to the environment in which they live. Depending on the harshness of the environment and the size of prey available, the weight of adult males can vary between 20 and 90 kilograms (females weigh slightly less), with a shoulder height ranging between 55 and 80cm.

Leopards have adapted to every habitat on the African continent, from the driest deserts to the tropical rainforest and high mountain ranges. They are just as catholic in their diet, which ranges from insects, fish, amphibians, reptiles, birds and rodents to large mammals and even other predators (including jackals, spotted hyenas and cheetahs) or carrion, though they normally prefer commonly occurring medium-sized antelope and wild pigs. Though they are not dependent on the availability of surface water they will drink regularly if it is available. Their penchant for storing the carcasses of their prey up high in the branches of trees, where it is inaccessible to competing predators, allows them to feed from the same carcass for up to 6 days.

Solitary by nature, Leopards only associate with others of their kind when mating or when cubs accompany their mother. Adults of both sexes hold territories that may cover enormous areas, depending on the availability of prey, are advertised by their rasping call and marked with urine, scat and scrape marks against prominent trees, and defended viciously, sometimes to the death, against interlopers of the same sex. Male territories are larger and can overlap with the areas of up to six females. Leopards are nocturnal, with most activity occurring from dusk to dawn, resting up in the deep shade of tree canopies, thickets and caves. They love basking in the early morning or late afternoon sun. Leopards can reach a speed of up to 60km/h, but can only maintain it for short bursts and rely on their camouflage and expert stalking skills to get within range of their prey.

Female Leopards usually give birth to 2 or 3 cubs (range from 1 to 6) after a short 3 month gestation at any time of the year. Newborn cubs are kept hidden in caves, among boulders, in thickets and even burrows while the mother is out hunting, until they start accompanying her at the age of about two to four months. Cubs become independent anywhere between 12 and 24 months of age, though only about half of the cubs born reach that age. Lions and spotted hyenas will attack and kill adult Leopards, while even jackals pose a threat to unguarded cubs.

Leopards have a wide distribution in Africa and Asia, but their populations have been reduced and become confined to increasingly isolated pockets over most of that range, leading the IUCN to classify it as “vulnerable” due to the persistent threats of illegal hunting and loss of habitat and prey. In South Africa, Leopards can be found in the mountains of the Western and Eastern Cape, along the Namibian and Botswana borders with the Northern Cape, in the Drakensberg range and northern Kwazulu-Natal, and widely in the North-West, Limpopo and Mpumalanga provinces, but their secretive nature makes it virtually impossible to determine their population size, with the EWT estimating the number of leopards occurring in South Africa between 2,800 and 11,600. In our experience, the Kruger National Park, Kgalagadi Transfrontier Park, Mapungubwe National Park, Pilanesberg National Park, Hluhluwe-Imfolozi Park, iSimangaliso Wetland Park (especially the Eastern Shores section) and Ithala Game Reserve presents the best chance of finding these elusive cats on a self-drive safari in South Africa.

Leopard on the S3

Leopard on the S3

 

Spotted Hyena

Crocuta crocuta

Spotted Hyenas roaming outside Mpila Cottage 16 in December 2018

Often depicted as cowardly villains and skulking scavengers, the truth is that the Spotted Hyena is a very efficient predator that mostly catches its own prey and dominates all other African predators with the exception of lions. Standing up to 90cm high and weighing up to 85kg, the females are considerably stronger built than the males and have very male-like genitalia, leading to a common misconception that spotted hyenas are hermaphrodites.

Spotted Hyenas have adapted to every habitat on the African continent except the tropical forests, though they prefer savannas, grasslands, woodlands and semi-deserts. They’re not dependant on drinking water but will drink when it is available and love cooling off in natural pools on hot days. Spotted Hyenas easily prey on anything from insects to giraffes and buffaloes, their diet normally reflecting which animals are most common in their area, but will also opportunistically scavenge from the kills of other carnivores (less than a third of their diet) and around rubbish dumps and human settlements. Excess food is often stored under water for later consumption. In many protected areas Spotted Hyenas have learnt that tourist camps are a reliable source of discarded food; a dangerous situation that often leads to injuries to people with lethal consequences for the hyenas.

Spotted Hyenas live in clans numbering from 3 to 80 (the size and stability of which depends on prey availability) in which a strict, female dominated, hierarchy exists. The most dominant female passes her status to her female young, and all females are dominant over all males in the clan. Males mostly join clans from other groups from which they were evicted, and it can take weeks and even months for them to be accepted into a new family. Each clan has a territory covering between 40 and 1800km² (dependent again on prey availability), that is demarcated with scent glands and communal dung middens and will be fiercely defended against interlopers. Within the territory a number of dens are established in dense vegetation, caves, between boulders or in holes in the ground (they’ll also often use human-made culverts under roads for this purpose) and used on a rotational basis. Spotted Hyenas are most active from dusk to dawn, usually hunting alone or in small parties except when going after big game, when the whole pack will join forces. When hunting they can reach speeds of up to 65km/h, but they can sustain a pace of 50km/h over a distance of up to 5km as they tire out their intended prey. They’re among the most vocal of mammals, and their well known laughing, howling and cackling is synonymous with the African night.

Females usually give birth to two cubs (though up to 4 have been recorded) at anytime of year. Cubs are kept hidden from the rest of the clan for the first two weeks of their life. More than one female in the clan may be raising cubs at the same time, but they will not take care of one another’s young. Cubs are often extremely aggressive to one another, especially of the same sex, and it is not unusual for some of the litter to die as a result of the constant fighting. The cubs are dark brown to black at birth, attaining adult colouration from the age of 2 to 3 months. Lions consider Spotted Hyenas their mortal enemies and will kill them at any opportunity, and outbreaks of rabies can decimate entire clans. Spotted Hyenas can live to the age of about 25 in the wild, and up to 40 years in captivity.

With a total population estimated between 27,000 and 47,000, the spotted hyena is one of the most numerous large carnivores on the African continent, and considered of least conservation concern by the IUCN. However, their populations are decreasing, especially outside large conservation areas, due to human pressures such as illegal hunting, poisoning and loss of habitat and prey. South Africa’s biggest population can be found in the Kruger National Park, estimated at up to 3,900 animals, and they are also a regular sighting in Addo Elephant National Park, Mapungubwe National ParkHluhluwe-Imfolozi Park and the iSimangaliso Wetland Park.

Spotted hyena

Spotted hyena

African Wild Dog

Lycaon pictus

African Wild Dogs are large canids, standing between 60 and 80cm high at the shoulder and weighing up to 36kg. Their blotched coats have patterns as unique to each individual as our fingerprints are. Perhaps “Painted Wolves” would be a more accurate name for these enigmatic carnivores, one of Africa’s rarest species.

African Wild Dogs inhabit grasslands, marshes, savannas, woodlands and semi-deserts, where they hunt mammals ranging in size from rodents to buffaloes, though their main prey is medium-sized antelope like the impala, springbok, bushbuck, nyala and reedbuck. These dogs have great stamina, and tire out their prey by chasing it at speeds of up to 60km/h for distances of up to 6km. They are among the most successful of predators, with between 70 and 90% of their hunting attempts resulting in a kill. They kill their prey by disembowelment, and although it appears cruel is actually a much quicker death than the suffocation employed by lions and other big cats. They feed extremely quickly; a pack of nine dogs can completely devour a 100kg antelope within 15 minutes. African Wild Dogs are not dependent on the availability of drinking water, but will drink regularly if it is available.

African Wild Dogs live in closely-knit packs numbering from 2 to 50 and occupying vast home ranges. Within the pack a strict hierarchy is maintained, with only the dominant pair allowed to breed. Often all the animals of the same sex within a pack are related as new packs are formed by groups of the same sex leaving their maternal packs when they become adult at about two years of age and joining up with unrelated animals of the opposite sex. Wild Dogs hunt mostly in the early morning and late afternoon, and also on moonlit nights, and rest up in the shade during the heat of the day.

The alpha female gives birth to between 2 and 21 tiny pups annually, mostly during the dry season when prey is easier to come by. The pups are born in holes in the ground, usually abandoned aardvark or warthog burrows. All the pack members take excellent care of the pups in the pack, bringing food back to the den for small puppies and allowing older puppies to feed first at a kill. Wild Dogs are susceptible to a wide variety of infectious diseases, often causing entire packs to be wiped out, but it is bigger and stronger predators – lions, hyenas and leopards – that are the biggest natural threat to both adult and juvenile Wild Dogs. Their life expectancy in the wild is only about 10 years.

The African Wild Dog is considered endangered with their population estimated at most around 6,600 and still declining due to disease and human pressures. Centuries of persecution by hunters and farmers have decimated their numbers, eradicating them from most of their former range. Today African Wild Dogs occur in only a few scattered pockets across the continent. In total South Africa is home to only about 400 – 500 African Wild Dogs, of which roughly half occurs in and around the Kruger National Park, with smaller populations in a handful of other public and private conservation areas, including Hluhluwe-Imfolozi Park, iSimangaliso Wetland Park, Tembe Elephant Park and Pilanesberg National Park.

Rhino Social Media

White rhino bulls use dung middens to communicate their presence and demarcate their territories. They’ll also kick around in the middens to transfer the scent onto their feet and then spread it throughout their stomping grounds, communicating their ownership to interlopers.

 

Mauritian Tomb Bat

Taphozous mauritianus

When we found a small colony of Mauritian Tomb Bats on the outside walls of the reception office at the Hluhluwe-Imfolozi Park’s Nyalazi Gate, it presented a good opportunity to learn a bit more about this seldomly seen creature.

Mauritian Tomb Bats are quite large for insectivorous bats, weighing as much as 36g and up to 11cm long. They occur in the moist savanna areas of north-eastern South Africa, further north into Central and East Africa, as well as on a few of the islands of the Indian Ocean. By day they roost in small, loosely associated groups on the shaded walls of buildings or on tree trunks, and not in caves or tombs as their name might suggest. At night they forage for moths and other nocturnal invertebrates, which they catch and eat in flight.

Most females raise a single baby at a time, though some do give birth twice annually. Dependent young cling to the mother as she flies around and at their roost, but as soon as they can fly themselves they become autonomous.

The IUCN considers the Mauritian Tomb Bat of “Least Conservation Concern” owing to its wide distribution, large population, and tolerance for habitat change.