Southern Giraffe: Africa’s Towering Icon

The Southern Giraffe (Giraffa camelopardalis giraffa) is a majestic symbol of the African savanna, captivating visitors to places like Kruger National Park. Known for its towering height and distinctive coat, this iconic ungulate is a must-see for wildlife enthusiasts. This guide explores the Southern Giraffe’s characteristics, habitat, diet, and fascinating history for an engaging and informative read.

Overview of the Southern Giraffe

The Southern Giraffe, also called the Southern African Giraffe, roams the savannas of northern South Africa, Botswana, and Zimbabwe. It is one of nine giraffe subspecies recognized by the Giraffe Conservation Foundation (GCF), with the Southern Giraffe being the only subspecies found in South Africa, including Kruger National Park. Other subspecies include:

Maasai Giraffe (Giraffa camelopardalis tippelskirchi): Kenya and Tanzania
West African Giraffe (Giraffa camelopardalis peralta): Angola to Nigeria
Reticulated Giraffe (Giraffa camelopardalis reticulata): Kenya and Tanzania

Origin of the Name “Giraffe”

The term “giraffe” has a rich history. In the early 1400s, Arab traders exploring East Africa encountered these “fast and graceful walkers,” naming them zarafa. This term evolved through Anglo-Germanic and Anglo-Saxon influences into the modern word “giraffe.” In South Africa, early Dutch settlers called it kameelperd, derived from the Latin camelopardis, meaning “camel leopard” due to its camel-like shape and leopard-like spots. The Zulu people, one of South Africa’s 11 official language groups, poetically call the giraffe iNdlulamithi, meaning “taller than the trees.” The first recorded giraffe sighting in South Africa was in 1663 by Pieter van Meerhof along the southwest coast, though giraffes likely roamed the interior savanna long before.

Physical Characteristics

As ruminants with a four-chambered stomach, Southern Giraffes chew cud and process their plant-based diet efficiently. Their impressive size sets them apart:

Males: Weigh 950–1,500 kg, with a shoulder height of 3.5 m and a total height up to 6 m.
Females: Weigh 650–950 kg, with a shoulder height of 3 m and a total height up to 4.7 m.

Their long necks, comprising seven vertebrae (like humans but much larger at ~30 cm each), make up about one-third of their body length by adulthood.

Giraffe Calves: Growth and Survival

Female giraffes have a 15-month gestation period and give birth to calves weighing 90–100 kg and standing 1.5 m tall. Born in a precocial state, calves can stand within an hour and move within two hours, a crucial adaptation to evade predators. Key facts about giraffe calves:

Growth: Calves grow nearly 1 cm per day, with their neck lengthening from one-sixth of their body at birth to one-third by age four.
Nursing: Calves stay close to their mothers, suckling frequently in the first weeks. Mothers may venture up to 3 km away but remain nearby, often forming a “nursery” with other females and calves.
Diet: Calves rely on milk for 90% of their diet initially, gradually incorporating plants and weaning around one year.
Survival: Calf mortality is high, with about 50% surviving their first year in Kruger National Park due to predators like lions and hyenas. Survival improves to 92% in year two and 97% in year three, thanks to their size and vigilance. Giraffes reach adulthood at around seven years and can live up to 25 years in the wild.

Habitat and Distribution

Southern Giraffes thrive in diverse savanna habitats, from semi-arid to subtropical regions. In Kruger National Park, they are most abundant in the central and southern regions, particularly between the Olifants and Crocodile Rivers, where open savanna with grasslands, scrub, and thorn trees like acacia (Vachellia) abound. The 2010–2011 Kruger census estimated a population of 6,800–10,300 giraffes, with the highest density (7 per 10 km²) in the central region.

Diet and Feeding Habits

Giraffes are selective browsers, feeding on nearly 50 plant species in Kruger National Park, with a preference for acacia and bushwillow (Combretum). Their diet includes:

Primary Foods: Leaves, twigs, buds, flowers, seedpods, and fruits.
Occasional Foods: Grass and herbs (less than 5% of their diet).
Unique Behavior: Giraffes sometimes chew bones (osteophagia) to supplement calcium and phosphorus, especially from April to October when acacia leaves are scarce. A 2008 University of Pretoria study found giraffes require two to three times more calcium than buffalo due to their large skeletal structure.

Giraffes feed 16–20 hours daily, primarily during daylight, consuming 25–35 kg of foliage. They draw most of their water from plants, visiting waterholes every 2–3 days to drink 12–40 liters, depending on the season.

Physiology: Evolutionary Marvels

The giraffe’s physiology is a testament to evolutionary adaptation. Key features include:

Neck and Circulation: Despite its length, the giraffe’s neck has seven vertebrae, supported by specialized arteries that regulate blood flow. The heart, the largest among cloven-hoofed animals at 45 cm in diameter, generates high blood pressure (280/180 mmHg or 35 PSI, compared to a human’s 120/80 mmHg). A network of veins called the rete mirabile prevents dizziness by regulating blood flow to the brain when the giraffe lowers or raises its head.
Evolutionary History: Giraffes evolved from a deer-like ancestor 50 million years ago during the Eocene era. By 15–10 million years ago, they developed longer legs and ossicones (skin-covered bone horns), with the modern giraffe genus emerging in East Africa around 1 million years ago.

Giraffes in Kruger National Park

Giraffes are widespread in Kruger, with the highest populations in the central and southern regions, favoring knob-thorn trees (Acacia nigrescens). Research by Johan du Toit in the 1990s confirmed giraffes browse at exclusive heights, giving them a unique ecological niche. However, they are not immune to predation. Studies by Tol Pienaar (1933–1966) found giraffes made up only 2% of lion kills, though they account for 32–43% of lion diets in giraffe-dense areas.

Fascinating Giraffe Facts

Daily Consumption: A large giraffe eats ~34 kg of foliage and drinks 38–48 liters of water daily in summer.
Speed: Giraffes can reach 55 km/h over short distances but cannot swim.
Horns: Giraffes are born with 25 mm ossicones that fold backward.
Home Range: Their territory spans 25–120 km², depending on the region.
Lifespan: Up to 25 years in the wild, 28 in captivity.

The Southern Giraffe is a remarkable creature, blending grace, resilience, and evolutionary ingenuity. Whether you’re planning a safari or simply curious, this gentle giant continues to inspire awe across the African savanna.