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Gerenuk
Litocranius walleriThe giraffe-necked gazelle of the dry bush.
The gerenuk is one of Africa's strangest antelopes - a slender, long-necked browser that rears up on its hind legs to pluck leaves from acacia and commiphora branches other herbivores cannot reach. A true specialist of the arid thornbush of the Horn of Africa and East Africa (including northeastern Tanzania), it rarely drinks, living almost entirely off the moisture in its food.
Gerenuk Quick Facts
What Is the Gerenuk?
The Gerenuk (Litocranius walleri) - often called the "giraffe-necked gazelle" - is one of the most distinctive antelopes in Africa. It is the sole member of the genus Litocranius, within the tribe Antilopini (the gazelle tribe). Its long neck and legs, small head and pointed snout are built for a very particular way of life: feeding high in the bushes, often balanced on its hind legs.
Geographically, the gerenuk is an East African and Horn of Africa species. Its range runs from southern Djibouti, Somalia and Ethiopia, through Kenya, to northeastern Tanzania. Its range lies entirely within the Horn of Africa and East Africa.
Why “Gerenuk”?
"Gerenuk" comes from the Somali garanuug, meaning "giraffe-necked" - a perfect description of its most obvious feature. The scientific name honours the explorer Horace Waller, after whom the species (walleri) was named in 1879.
Signature Features
A gerenuk is slender and upright, with an elongated neck and long, thin legs that give it a gazelle-like but distinctly stretched silhouette. The coat is two-toned: a reddish-brown "saddle" over the back, fading to pale buff on the flanks, with white underparts, a white rump patch, white eye-rings, white lips and white insides of the large ears.
Only males carry horns - short, heavily ringed, lyre- or S-shaped, curving back then slightly forward (25-44 cm). The large dark eyes and mobile lips help it select the choicest leaves. The true signature, though, is behaviour: the gerenuk is the only antelope that can stand unsupported on its hind legs to browse.
How Big Is a Gerenuk?
Gerenuks stand about 80-105 cm at the shoulder and measure roughly 140-160 cm from head to tail. They are lightly built: weights run from about 28 kg in females to 52 kg in males (roughly 62-114 lb).
Despite the "giraffe" nickname, it is a small antelope - but its neck and legs make it look taller and more attenuated than its weight suggests.
Horns & Defence
The lyre-shaped horns are borne only by males. They are 25-44 cm long, heavily ringed at the base and curve backward then slightly forward. Males use them in shoving matches when defending territories, though serious fights are rare.
Habitat & Range
Gerenuks occupy dry thornbush savanna, semi-arid shrubland and open scrub, especially where scattered acacia and commiphora trees provide browse at height. They avoid dense woodland and very open, grassy plains.
Their moisture-efficient lifestyle lets them use the arid fringes of their range - in fact their population density can actually increase with distance from permanent water, the opposite of most antelopes.
Gerenuk in Tanzania
In Tanzania, gerenuk are confined to the dry north-east of the country. The most reliable places are Tarangire and Mkomazi national parks, where acacia woodlands suit them. More broadly, the species ranges across Kenya (Samburu and Tsavo are classic gerenuk country) and the Horn of Africa (southern Ethiopia, Somalia and Djibouti).
Tarangire, Tanzania
Dry acacia woodlands in northern Tanzania hold gerenuk; scan the bush at eye level rather than the ground.
Tarangire safariMkomazi, Tanzania
A semi-arid reserve on the Kenya border, among the best Tanzanian spots for gerenuk.
Samburu, Kenya
The quintessential gerenuk landscape - rugged dry bush where they perch on hind legs among the acacias.
Tsavo, Kenya
Vast arid thornbush in southern Kenya supports healthy gerenuk populations.
Behavior & Social Life
Gerenuks are diurnal: they feed through much of the day but rest in shade during the hottest midday hours. They are notably peaceful and sedentary - they fight and travel little, apparently to conserve energy for foraging, and become even less mobile with age.
Social life is not a herd with a leader. Instead:
- Adult males are solitary and territorial, marking trees and shrubs with preorbital-gland secretions and maintaining dung middens across home ranges of about 3-6 km².
- Females and young form small nursery herds of 2-6 animals, often single-sex, that drift and reassociate.
- Young males gather in bachelor groups until they can establish their own territories.
Diet & Feeding
The gerenuk is one of Africa's most specialized browsers - almost exclusively a leaf-eater, and a model of feeding niche separation. Its diet is foliage of trees and shrubs: leaves, shoots, herbs, flowers and fruits, with a strong preference for acacia, commiphora and grewia. Grass forms a negligible part of its intake.
Its signature feeding tactic is bipedal browsing: it rears up on its hind legs, uses a stiff tail for balance and its front hooves to pull branches down, reaching foliage up to about 2 metres above the ground - higher than virtually any other antelope can. A pointed snout, long upper lip and dextrous tongue let it strip tender leaves while avoiding thorns.
Crucially, the gerenuk rarely drinks. It meets its water needs from the moisture in leaves, which is why it can thrive far from rivers and waterholes - a key reason it favours dry country over lush grassland.
Predators & Defense
Adults fall mainly to leopards and lions; cheetahs, spotted hyenas and African wild dogs take gerenuk when they can, and calves are the most vulnerable. Males will use their horns defensively. Their watchful posture - often perched on hind legs surveying the bushes - helps them spot danger early.
Young & Lifespan
Gerenuk breed year-round, with births often peaking after the rains. After a gestation of about 6.5-7 months, a single calf is born, weighing roughly 3 kg; it is hidden in cover and the mother returns to nurse. The calf begins sampling leaves within weeks and is independent by about a year.
Lifespan is about 8 years in the wild and up to 13 or more in captivity.
Conservation Status
The gerenuk is listed as Near Threatened on the IUCN Red List (total population around 95,000 and decreasing). It is not currently classed as Vulnerable, but assessors note it "is likely to qualify for Vulnerable in the near future" because of ongoing pressures.
The main threats are habitat loss and fragmentation from agricultural expansion, overgrazing by livestock, and clearing of thornbush, plus hunting for meat and trophies. Because it depends on specific dry bushland, it is especially vulnerable to habitat conversion. Protected areas such as Tarangire, Mkomazi, Samburu and Tsavo are important strongholds.
Safari Experience
Seeing a gerenuk is a dry-country highlight - a creature that looks like it was stretched on a rack, then taught to moonlight as a giraffe. The best strategy is to scan the acacia and commiphora at eye level, not the grass, during the cooler hours of morning and late afternoon.
In Tanzania, Tarangire and Mkomazi are your best bets; across the border, Kenya's Samburu is legendary for them. They are Near Threatened and habitat-sensitive, so a sighting is a privilege worth protecting - keep your distance and let them browse in peace.
Comparisons
Three common safari antelopes show how unusual the gerenuk's niche is. All belong to the tribe Antilopini, but their feeding ecology differs sharply:
| Feature | Gerenuk | Impala | Thomson's Gazelle |
|---|---|---|---|
| Scientific name | Litocranius walleri | Aepyceros melampus | Eudorcas thomsonii |
| Feeding | Specialized browser | Mixed feeder | Grazer |
| Hind-leg browsing | Yes (unique) | No | No |
| Horns | Males only | Males only | Both sexes |
| Range | Horn of Africa & E. Africa | Southern & E. Africa | East Africa |
Did You Know?
Giraffe-necked
Its Somali name means "giraffe-necked" - and it's the only antelope that browses while standing on its hind legs.
Browses at height
Rearing up, it reaches foliage about 2 m up, avoiding competition with ground-grazing antelopes.
Rarely drinks
It gets almost all its water from leaves, so it can live far from rivers - density even rises away from water.
Near Threatened
About 95,000 remain and numbers are declining, though it is not yet Vulnerable.
Two-tone coat
A reddish saddle contrasts with white underparts, eye-rings and the insides of its big ears.
Close to Vulnerable
IUCN notes it is likely to qualify as Vulnerable in the near future without continued protection.
There is a moment on a dry-country drive when the bush seems to rearrange itself: a slender shape rises straight up on two legs, front hooves hooking a branch, neck craning into the acacia. For a second it is more giraffe than gazelle - and then it drops, unhurried, and the gerenuk is just an antelope again.
Gallery
Frequently Asked Questions
Litocranius walleri. It is the only species in its genus and belongs to the gazelle tribe (Antilopini).
Its Somali name means "giraffe-necked", referring to its long neck and legs. It reinforces the nickname by rearing up on its hind legs to feed.
In the dry thornbush and semi-arid savanna of the Horn of Africa and East Africa - Somalia, Ethiopia, Djibouti, Kenya, and northeastern Tanzania.
Yes - in the dry north-east, especially Tarangire and Mkomazi. But the species' range spans East Africa and the Horn, so Tanzania is only part of its distribution, not the whole of it.
They are highly specialized browsers: leaves, shoots, flowers and fruits of trees and shrubs (acacia, commiphora, grewia). They stand on their hind legs to reach high foliage, eat almost no grass, and rarely drink - getting water from their food.
Yes. It is the only antelope that browses bipedally and unsupported, balancing on its hind feet and tail while pulling branches down with its front hooves, reaching about 2 m up.
It can reach speeds of roughly 56 km/h (about 35 mph) when fleeing.
Adult males are solitary and territorial (marking with preorbital glands and dung middens); females and young form small nursery herds of 2-6; young males form bachelor groups. They are peaceful and sedentary, conserving energy for foraging.
Leopards and lions are the main predators; cheetahs, spotted hyenas and African wild dogs also take them, with calves most at risk.
They stand about 80-105 cm at the shoulder, measure 140-160 cm long, and weigh 28-52 kg depending on sex.
Near Threatened on the IUCN Red List (about 95,000 animals, decreasing). It is not yet Vulnerable, but assessors expect it may qualify as Vulnerable in the near future.
References & Further Reading
- Wikipedia - Gerenuk: Litocranius walleri; tribe Antilopini; range from Djibouti/Somalia/Ethiopia through Kenya to NE Tanzania; Near Threatened; browser; stands on hind legs; males-only lyre horns 25-44 cm; shoulder 80-105 cm, weight 28-52 kg.
- Animalia.bio - Gerenuk: height 80-105 cm, length 140-160 cm, weight 28-52 kg, top speed 56 km/h; folivore/browser; Near Threatened, ~95,000, decreasing; range Djibouti, Ethiopia, Kenya, Somalia, Tanzania.
- Encyclopaedia Britannica - Gerenuk: longest-necked member of the gazelle tribe; browsing antelope of lowland arid thornbush of the Horn of Africa; shoulder 80-105 cm; weight 28-52 kg; males-only S-shaped horns 32-44 cm; reaches foliage by standing on hind legs; density increases with distance from water.
- Animal Diversity Web - Litocranius walleri: males solitary and territorial, marking with preorbital gland; long necks/legs and hind-leg standing let them reach leaves others cannot.
- Samburu Reserve - Gerenuk: strict browsers of shrubs, herbs and low tree foliage; territorial males mark with preorbital secretions; females and young form loose temporary groups; diurnal, foraging at cooler times.
- IUCN Red List (Litocranius walleri): assessed Near Threatened; population decreasing; likely to qualify for Vulnerable in the near future.
