The addax is a heavyset desert antelope built for one of the harshest environments on Earth, the sand seas and stony plains of the central Sahara. Once ranging across the Sahelo-Saharan belt from Mauritania to Sudan, it is today one of the most imperiled large mammals in the world, with very few animals remaining in the wild [IUCN 2016] [Dicks et al. 2023]. Its pale coat, spiraled horns, and ability to survive almost entirely without drinking water have made it an emblem of Saharan wildlife, even as its wild range has contracted to a sliver of its former extent [Dicks et al. 2023].
This page summarizes what is known about the species and the recovery work underway to keep it from disappearing from the wild altogether.
Biology and Identification
The addax is a stocky antelope, with adults weighing roughly 60–125 kg and standing about 95–115 cm at the shoulder [ADW 2024]. Both sexes carry long, spiraling horns that average around 72 cm and twist through roughly 1.5 to 3 turns [ADW 2024]. The coat changes seasonally: sandy to nearly white in the hot months and darkening to grayish-brown in winter, with white markings on the face, belly, and legs and a dark tuft of hair on the forehead [ADW 2024]. The Latin name nasomaculatus, meaning "spotted nose," refers to the white facial patch.
Several traits make the addax among the most desert-adapted of all antelopes. Its hooves are broad and splayed, spreading the animal's weight for travel over loose sand [ADW 2024]. It can persist for extended periods without free-standing water, drawing nearly all of its moisture from the desert grasses and scrub it eats [ADW 2024]. Recorded lifespans reach about 25 years in managed care [ADW 2024]. Behaviorally, addax move across large distances to track sparse rainfall and the patchy vegetation it produces, and surveys have shown the species responds strongly and negatively to human disturbance on the open desert [Stabach et al. 2017].
Habitat and Range
The addax is a specialist of true desert: sandy and stony Saharan terrain, including dune fields and interdune plains. Field and remote-sensing analysis across the Tin Toumma desert found addax occurrence linked to surface roughness and the presence of perennial desert grasses such as Stipagrostis acutiflora [Stabach et al. 2017]. Historically the species occurred across a broad Sahelo-Saharan band spanning much of North Africa [IUCN 2016].
That distribution has collapsed. Genetic and survey work indicates the species now persists in the wild in roughly 0.68% of its historical range, effectively a single area straddling the Tin Toumma desert of Niger toward the border with Chad [Dicks et al. 2023]. Monitoring patrols in this region, including camel-based surveys, continue to document the small surviving group [Böhm et al. 2023].
Conservation Status
The addax is assessed as Critically Endangered on the IUCN Red List, in the assessment published in 2016 by the IUCN SSC Antelope Specialist Group, under criteria A2cd; C2a(ii); D, with a decreasing population trend [IUCN 2016]. At the time of assessment, fewer than 100 mature individuals were estimated to survive in the wild [IUCN 2016] [Dicks et al. 2023].
In contrast to the tiny wild population, a substantial managed population exists: nearly 1,200 addax are registered in the global ZIMS studbook database, with several thousand more in unregistered private collections in the United States and the Arabian Peninsula [Dicks et al. 2023]. This ex situ reservoir, descended from animals brought into captivity in the twentieth century, is the genetic foundation for reintroduction [Dicks et al. 2023]. The addax is also listed as Endangered under the U.S. Endangered Species Act, a listing that took effect in 2005 [USFWS 2024].
Threats
The decline of the addax has been driven chiefly by uncontrolled hunting, made far more lethal by motorized access and firearms across open desert [IUCN 2016]. Habitat degradation and competition with livestock further reduced the forage available in its range [IUCN 2016]. Regional insecurity has hampered protection and monitoring across parts of the Sahara [Dicks et al. 2023].
More recently, oil exploration and the associated roads, vehicles, and human presence have intruded directly on the species' last wild refuge in Niger, increasing disturbance and exposure to poaching [Dicks et al. 2023]. Because the surviving wild group is so small and concentrated, it is also susceptible to the genetic and demographic risks that accompany very small populations [Dicks et al. 2023].
What Is Being Done
Conservation organizations, national wildlife authorities, and zoological institutions are working to stabilize and rebuild wild populations. Sahara Conservation and partners conducted the first formal addax population estimate in Niger's Termit Massif in 2007, which helped trigger coordinated action [Sahara Conservation 2024]. Field protection now includes ranger and patrol monitoring of the remaining wild animals, including dromedary-based patrols in the Tin Toumma desert [Böhm et al. 2023].
Reintroduction is central to recovery. Captive-bred addax sourced largely from Abu Dhabi have been released into Chad's Ouadi Rimé–Ouadi Achim Faunal Reserve, where the establishing population, including wild-born offspring, has grown to over 150 animals; additional animals have been released in Chad's Ennedi reserve and in Morocco [Sahara Conservation 2024]. Released animals have been tracked with GPS and satellite collars to study survival, movement, and habitat use [Sahara Conservation 2024]. Studbook management of the global captive population aims to retain genetic diversity for future releases [Dicks et al. 2023].
How You Can Help
You can support the addax by learning about Saharan ecosystems and sharing accurate, sourced information about the species and the organizations working on its recovery. Supporting reputable conservation groups and accredited zoological institutions that contribute to ex situ breeding and field protection helps sustain the long-term recovery program [Sahara Conservation 2024] [Dicks et al. 2023]. Following the published findings of the IUCN SSC Antelope Specialist Group and peer-reviewed research is the most reliable way to stay informed about the species' status [IUCN 2016].
References
[IUCN 2016] IUCN SSC Antelope Specialist Group. (2016). Addax nasomaculatus. The IUCN Red List of Threatened Species 2016: e.T512A50180603. https://www.iucnredlist.org/species/512/50180603
[Dicks et al. 2023] Dicks, K. L., Banes, G. L., Koepfli, K.-P., et al. (2023). Genetic diversity in global populations of the Critically Endangered addax (Addax nasomaculatus) and its implications for conservation. Evolutionary Applications, 16(1). https://pmc.ncbi.nlm.nih.gov/articles/PMC9850015/
[Stabach et al. 2017] Stabach, J. A., Rabeil, T., Turmine, V., Wacher, T., Mueller, T., & Leimgruber, P. (2017). On the brink of extinction—Habitat selection of addax and dorcas gazelle across the Tin Toumma desert, Niger. Diversity and Distributions, 23(6), 581–591. https://doi.org/10.1111/ddi.12563
[Böhm et al. 2023] Böhm, M., et al. (2023). Addax (Addax nasomaculatus) monitoring using dromedary patrols in the Tin Toumma Desert, Niger. Gnusletter 40(1). https://noe.org/app/uploads/2025/07/Bohm-et-al.-2023-Gnusletter-401-Addax-monitoring-using-dromedary-patrols-in-the-Tin-Toumma-Desert-Niger.pdf
[ADW 2024] Animal Diversity Web. (2024). Addax nasomaculatus (addax). University of Michigan Museum of Zoology. https://animaldiversity.org/accounts/Addax_nasomaculatus/
[Sahara Conservation 2024] Sahara Conservation. (2024). Bringing the addax back to the wild. https://saharaconservation.org/species-recovery/restoring-the-addax/
[USFWS 2024] U.S. Fish and Wildlife Service. (2024). Species profile for addax (Addax nasomaculatus). Environmental Conservation Online System. https://ecos.fws.gov/ecp/species/1486