The giraffe gazelle: an East African antelope that stands on two legs to eat.

Nature · Published 3 October 2026 Swipe more like this →

In short: The gerenuk is a master of vertical foraging, capable of reaching foliage over two meters above the ground by standing on its hind legs. This long-necked antelope, native to East Africa, has evolved unique physical adaptations that allow it to thrive in arid environments while rarely needing to drink water.

Known as the giraffe gazelle, the gerenuk (Litocranius walleri) is a singular species within its genus. First described by naturalist Victor Brooke in 1879, the animal is defined by its exceptionally long neck and limbs. Its common name originates from the Somali word gáránúug, while its scientific classification has been the subject of significant phylogenetic study. While early research suggested a close relationship with the dibatag, modern genetic analysis, including work by Eva Verena Bärmann in 2013, places the gerenuk in a clade with the springbok.

The gerenuk is sexually dimorphic, with males reaching heights of up to 105 centimetres and possessing lyre-shaped horns that can measure up to 44 centimetres. These antelopes are primarily browsers, utilizing a pointed mouth to extract leaves from thorny vegetation like acacia. Their ability to stand erect on their hind legs allows them to access food sources inaccessible to other gazelles, a strategy that complements their sedentary nature. By minimizing travel and fighting, they conserve energy, maintaining home ranges of three to six square kilometres.

Reproduction occurs throughout the year, with a gestation period of approximately seven months. While sexual maturity is reached by age one for females and 1.5 years for males, successful breeding in the wild often requires the acquisition of a territory, typically by age 3.5. In captivity, the species has been the subject of advanced reproductive research; in 2010, White Oak Conservation in Florida successfully produced offspring through artificial insemination, eventually achieving a second generation of calves. These animals can live for thirteen years or more in captivity, though their lifespan in the wild is generally at least eight years.

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