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29-5-2019 SOMALISA CAMP, ZIMBABWE - WHITE BROWED SPARROW WEAVER (Plocepasser mahili)
The white-browed sparrow-weaver (Plocepasser mahali) is a predominantly brown, sparrow-sized bird found throughout central and north-central southern Africa It is found in groups of two to eleven individuals consisting of one breeding pair and other non-reproductive individuals.
During his expedition to the interior of southern Africa in 1834–35, Andrew Smith collected specimens of the white-browed sparrow weaver at the Modder River, which he described in 1836, giving it the scientific name Plocepasser mahali.
Smith did not provide an explanation for the species epithet mahali, but is clear it is not a Latin name. Probably it is derived from the vernacular name for the bird in Setswana mogale or from the Sesotho word mohale, a brave or fierce person, which suggests the bird's name may refer to its angry scolding.
It ranges from 17 to 19 cm (6.7 to 7.5 in) in length and is characterized by a broad, white eyebrow stripe and white rump visible in flight. While the male white-browed sparrow-weaver sports a black bill, the female's bill is horn-colored (light gray); that of the juvenile is pinkish-brown. In Zimbabwe, the white-browed sparrow-weaver shows faint brown spotting across its white breast.
The white-browed sparrow-weaver may emit either a brief chik-chick or a loud, fluid, cheoop-preeoo-chop whistle.
The white-browed sparrow-weaver is found in greatest numbers in north-central southern Africa. While this species most densely populates dry regions with woodland or wooded grassland at northern South Africa, its range includes Botswana, northern and central Namibia, and western Zimbabwe. It is seen very often in South Luangwa National Park, Zambia and southern Malawi. Populations may be found as far north as Ethiopia. Populations are sedentary.
This species nests in colonies along thornveld and scrubby, dry riverbanks.
Breeding has been observed year round, but occurs mainly in warmer months. Year round, groups of the white-browed sparrow-weaver are active and nest-building. Groups of ten to sixty inverted-U-shaped nests of dry grass appear in the outside limbs of trees, although only several are used for breeding or roosting. While breeding nests have only one entrance, roosting nests have an entrance located at each of the two nest extremities. The construction of these nests shows cultural variations. Research has shown that, throughout a region, nests are located at the leeward side of a tree. This behavior preserves a greater number of intact nests for breeding and roosting. White-browed sparrow-weaver nests are sometimes used by other birds, such as the red-headed finch and ashy tit.
Different populations of this species vary in their ability to regulate their body temperature when there are changes in air temperature. White-browed sparrow-weavers from hotter and drier parts of the desert maintained higher body temperatures and let their bodies heat up comparatively more during the warmest part of the day compared to birds from a milder semi-desert site. This daily heterothermy means that desert birds do not need to use as much evaporative cooling and therefore can conserve body water. Within the population of semi-desert birds, there were also seasonal changes in daily heterothermy, with higher heterothermy during the dry season compared to the wet season. When air temperatures are very high, white-browed sparrow weavers also spend less time foraging in direct sunlight and more time in shaded areas.
The white-browed sparrow-weaver is becoming more abundant, expanding its range on southern, northern, and eastern fronts.
29-5-2019 THORNTREE CAMP, ZAMBIA - SOUTHERN WHITE RHINOCEROS (Ceratotherium simum ssp simum)
The southern white rhinoceros or southern white rhino (Ceratotherium simum simum) is one of the two subspecies of the white rhinoceros (the other being the much rarer northern white rhinoceros). It is the most common and widespread subspecies of rhinoceros.
The southern white rhinoceros is the nominate subspecies; it was given the scientific name Ceratotherium simum simum by the English explorer William John Burchell in the 1810s. The subspecies is also known as Burchell's rhinoceros (Ceratotherium simum burchellii) after Burchell and Oswell's rhinoceros (Ceratotherium simum oswellii) after William Cotton Oswell, respectively. However, these are considered synonyms of its original scientific name.
Ceratotherium simum kiaboaba (or Rhinoceros kiaboaba), also known as straight-horned rhinoceros, was proposed as a different subspecies (or species) found near Lake Ngami and north of the Kalahari Desert. However, it is now considered part of the southern white rhinoceros and ranges throughout southern Africa.
Lifespan is up to 50 years in the wild.
Following the phylogenetic species concept, research in 2010 suggested the southern and northern white rhinoceros may be different species, rather than subspecies, in which case the correct scientific name for the northern subspecies is Ceratotherium cottoni and the southern subspecies should be known as simply Ceratotherium simum. Distinct morphological and genetic differences suggest the two proposed species have been separated for at least a million years.
The southern white rhinoceros is one of largest and heaviest land animals in the world. It has an immense body and large head, a short neck and broad chest. Females weigh around 1,600–1,700 kg (3,530–3,750 lb) and males around 2,000–2,300 kg (4,410–5,070 lb), with specimens of up to 3,600 kilograms (7,940 lb) considered reliable, and larger sizes up to 4,500 kg (9,920 lb) claimed but not verified. The head-and-body length is 3.35–4 m (11.0–13.1 ft) and a shoulder height of 160–186 cm (5.25–6.10 ft). It has two horns on its snout. The front horn is larger than the other horn and averages 60 cm (24 in) in length and can reach 166 cm (65 in) in females.
Females usually have longer but thinner horns than the males, who have larger but shorter ones. The southern white rhinoceros also has a prominent muscular hump that supports its large head. The colour of this animal can range from yellowish brown to slate grey. Most of its body hair is found on the ear fringes and tail bristles, with the rest distributed sparsely over the rest of the body. The southern white rhino has a distinctive flat, broad mouth that is used for grazing. Southern white rhinos are strictly herbivores (graminivores) that feed on short grasses.
Little is known about southern white rhinoceros mating habits, but females reproduce every 2–3 years. They give birth to a single calf, after a gestation period that lasts around 16 months. Males are never directly involved in the raising of calves; in rare instances, certain rogue individuals may even kill calves that they perceive as future competition, both for resources and bloodline dominance. Newborn calves weigh about 45 kg (100 pounds) at birth. Young usually become independent in 2–3 years.
The southern white rhino lives in the grasslands, savannahs, and shrublands of southern Africa, ranging from South Africa to Zambia. About 98.5% of southern white rhino live in just five countries: South Africa, Namibia, Zimbabwe, Kenya and Uganda.
The southern white rhino is listed as Near Threatened; it is mostly threatened by habitat loss and poaching for rhino horn for use in traditional Chinese medicine.
29-5-2019 THORNTREE CAMP, ZAMBIA - SOUTHERN WHITE RHINOCEROS (Ceratotherium simum ssp simum) (JUVENILE)
The Southern White Rhino is Africa's largest rhino, a grazer with a broad, square lip for eating grass, known for its impressive comeback from near extinction, now classified as Near Threatened, living in herds (cows/calves) or solitary (bulls), and relying on excellent hearing/smell despite poor eyesight, using its keratin horns for defense and social cues.
Key Facts:
Size: Massive, up to 2,500 kg (5,500 lbs) or more, making them the third-largest land mammal.
Diet: Herbivore (grazer) with a distinctive wide, flat mouth for cropping grasses.
Horns: Two horns, front one longer, made of keratin (like fingernails).
Social Behavior: Semi-social; females & young form herds (crashes), while mature males (bulls) are usually solitary and territorial.
Senses: Poor eyesight but excellent hearing and sense of smell.
Habitat: Grasslands and savannahs in Southern Africa, with strongholds in South Africa.
Conservation: Once nearly extinct, conservation efforts saved them; now Near Threatened, but still vulnerable to poaching.
Fun Fact: They love mud baths (wallowing) to cool down and protect skin from sun/insects.
29-5-2019 THORNTREE CAMP, ZAMBIA - SOUTH AFRICAN GIRAFFE (Giraffa camelopardalis ssp. giraffa)
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The South African giraffe or Cape giraffe (Giraffa giraffa or Giraffa camelopardalis giraffa) is a species or subspecies of giraffe found in South Africa, Namibia, Botswana, Zimbabwe, Eswatini and Mozambique. It has rounded or blotched spots, some with star-like extensions on a light tan background, running down to the hooves.
In 2016, the population was estimated at 31,500 individuals in the wild.
The IUCN currently recognizes only one species of giraffe with nine subspecies.The Cape giraffe, along with the whole species, were first known by the binomen Camelopardalis giraffa as described by German naturalist Johann Christian Daniel von Schreber in his publication Die Säugethiere in Abbildungen nach der Natur mit Beschreibungen (The Mammals Illustrated from Nature with Descriptions) during his travel in the Cape of Good Hope in 1784. Dutch naturalist Pieter Boddaert also described it under the binomial name Giraffa giraffa whilst also identifying the nominate specimen of said species under the ternary name Giraffa camelopardalis giraffa in 1785.
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The South African giraffe has dark, somewhat rounded patches "with some fine projections" on a tawny background colour. The spots extend down the legs and get smaller. The median lump of males is less developed.
The South African giraffe is found in northern South Africa, southern Botswana, southern Zimbabwe, and south-western Mozambique. After local extinctions in various places, South African giraffes have been reintroduced in many parts of Southern Africa, including in Eswatini. They are common in both in and outside of protected areas. South African giraffes usually live in savannahs and woodlands where food plants are available. Giraffes are herbivorous. They feed on leaves, flowers, fruits and shoots of woody plants such as Acacia.
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South African giraffes live in a fission–fusion society system based on factors such as sex, age, season, and kinship. This allows them to adapt to environmental changes.
The South African giraffe population is estimated at 37,000 individuals, showing an increase of over 150% over the past three decades. The International Union for the Conservation of Nature, the body that administers the world's official endangered species list, announced in 2016 that it was moving the giraffe from a species of Least Concern to Vulnerable status in its Red List of Threatened Species report. That means the animal faces extinction in the wild in the medium-term future if nothing is done to minimize the threats to its life or habitat.
South African giraffes are uncommon in captivity. As of 2010, there are around 45 South African giraffes breeding in zoos. Approximately 12,000 privately owned farms, ranches, and national parks maintain populations of this giraffe.
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