|Scientific Name:||Equus africanus|
|Species Authority:||Heuglin & Fitzinger, 1866|
|Taxonomic Notes:||This taxon is sometimes treated under the specific name asinus. However, this is considered to be the name applied to the domestic form and is so generally rejected in favour of africanus. Gentry (2006) criticized the incorrect use of the name E. asinus for the Wild Ass by Grubb (2005). There are two recognized extant subspecies, although there is disagreement as to whether the African Wild Ass is one continuously distributed species exhibiting clinal variation (see Moehlman 2002, Moehlman et al. 2013). Groves (2002) lists a third unnamed subspecies from the Sahara, although these may not have been true Wild Asses.|
|Red List Category & Criteria:||Critically Endangered C2a(i) ver 3.1|
|Assessor(s):||Moehlman, P.D., Kebede, F. & Yohannes, H.|
|Reviewer(s):||Low Mackey, B. & Hrabar, H.|
Listed as Critically Endangered as the species numbers (at best approximately 200 mature individuals) may be undergoing a continuing decline due to climate and human/livestock impact, and no subpopulation numbers in excess of 50 mature individuals. The species may also meet the threshold for Critically Endangered under D, as there may be less than 50 mature individuals in the wild.
|Range Description:||The African Wild Ass occurs in Eritrea and Ethiopia, and some animals may persist in Djibouti, Somalia, Sudan and Egypt, but there is no recent information available (Moehlman et al. 2013). Yalden et al. (1996) recorded them to 1,500 m in Ethiopia.
Two subspecies are recognized. The Nubian Wild Ass, E. a. africanus, lived in the Nubian desert of north-eastern Sudan, from east of the Nile River to the shores of the Red Sea, and south to the Atbara River and into northern Eritrea (Watson 1982). During aerial flights in the 1970s, wild asses were seen in the Barka Valley of Eritrea and in the border area between Eritrea and the Sudan (Watson 1982). The Somali Wild Ass, E. a. somaliensis, was found in the Denkelia region of Eritrea, the Danakil Desert and the Awash River Valley in the Afar region of north-eastern Ethiopia, western Djibouti, and into the Ogaden region of eastern Ethiopia. In Somalia, they ranged from Meit and Erigavo in the north to the Nugaal Valley, and as far south as the Shebele River (Moehlman 2002, Moehlman et al. 2013).
The current range of the African Wild Ass in Ethiopia and Eritrea is approximately 23,000 km2 (Kebede 2013, Teclai 2006). DNA extracted from faecal samples collected from animals in Eritrea and Ethiopia resulted in the identification of five mitochondrial DNA haplotypes: one haplotype (group of polymorphisms) is specific to the Eritrean population (haplotype D); one haplotype specific to the Ethiopian population (haplotype E); and three shared haplotypes (A, B, and C). These results suggest that there is and/or has been gene flow between the subpopulations (Afrera, Serdo) in Ethiopia and the population in Eritrea (Oakenfull et al. 2002).
|Range Map:||Click here to open the map viewer and explore range.|
In Ethiopia, there has been a severe population decline since the early 1970s. Klingel (1977) recorded group sizes of 10-30 individuals in the Danakil, and he estimated a density of 18.6 wild asses per 100 km2 in an area of approximately 10,000 km2. During that survey, Yangudi-Rassa National Park (NP) had the highest density (30 wild asses per 100 km2). In 1994, Moehlman and Kebede did a ground survey of the Yangudi-Rassa NP, but no wild asses were seen, although local Issa pastoralists reported that they were present but rare and occurred at an approximate density well below one animal per 100 km2 (Moehlman 1994, Kebede 1995, Moehlman et al. 1998). Surveys conducted from 1994-1998 in an area of 2,000 km2 indicated that there were approximately 0.5 wild ass per 100 km2 (Moehlman 2002). In 2007, Kebede surveyed the historic range of the African Wild Ass in Ethiopia (Kebede et al. 2007) and determined that they have been extirpated from the Yangudi-Rassa NP and the Somali Region and that the only remaining population is in the northeastern Afar Region. The total number of wild ass observed during this survey was 25 in an area of 4,000 km2 yielding a density of 0.625 animals per 100 km2. In 2009 and 2010, Kebede (2013) did quarterly ground surveys in the African Wild Ass range and sampled 17% of the total African Wild Ass range in Ethiopia (12,300 km2). The density estimate was computed applying D=N/A where D=density, N total number of individuals recorded, A= sample area (km2). Then the result obtained was extrapolated to the suitable habitat determined using the Maxent model to estimate the population (Kebede et al. 2014). The 2009-2010 survey results indicated that the species’ distribution is restricted to few localities in the Danakil. The current population estimate indicated that this species occurs in low density, approximately one African Wild Ass per 100 km2. Current population estimates indicate that the population size has declined significantly (~94%) since the 1970’s and 112±4 individuals of African Wild Asses are estimated to survive in the Danakil desert (Kebede 2013).
In Eritrea, there are limited long-term data. The first successful survey was made in 1996 (Moehlman et al. 1998) and there has been a research and conservation programme with the Ministry of Agriculture and Hamelmalo Agricultural College. The main study site in the Northern Red Sea Zone has had a population of roughly 47 individuals per 100 km2 (Moehlman et al. 1998, Moehlman 2002). This is the highest population density found anywhere in the present range of the species and is similar to population densities recorded in Ethiopia in the early 1970s (Klingel 1977). This is a limited study area (100 km2), but recent research indicates that African Wild Ass currently inhabit approximately 11,000 km2 in the Denkelia desert (Teclai 2006). Surveys and Maxent analyses of suitable habitat are needed to determine the distribution and density of African Wild Ass in this larger area. A rough estimate of African Wild Ass in Eritrea would yield a total of possibly 400 individuals.
In 1978-1980, Watson (1982) did aerial surveys in northern Somalia and estimated that there was a population of 4,000-6,000 African wild ass in the area from the Nugaal Valley to the Djibouti border. Given the area covered by the survey, this would indicate approximately six African wild ass per 100 sq km. In 1979/82 Simonetta and Simonetta (1983) estimated that there were about 250 African Wild Ass in the northwestern Nugaal Valley and that there were about 50 African Wild Ass near Meit, with scattered groups along the coast in the Erigavo region. In 1989 (Moehlman 1998) a ground survey with limited aerial reconnaissance in the Nugaal Valley yielded population estimates of roughly 135 to 205 wild asses or approximately 2.7 to 4.1 asses per 100 km2. This indicates that there perhaps has been a significant reduction in the African wild ass population during the decade between those surveys. In 1997, Moehlman returned to the Nugaal Valley but was not able to survey the entire area. Local pastoralists said that there was less than ten African wild ass left in the Nugaal Valley (Moehlman et al. 2013). Some animals may remain near Meit and Erigavo, but this area has not been surveyed since the 1970s (Moehlman et al. 2013). It is not known if African Wild Ass currently persists in Somalia.
In summary, the total number of observed African Wild Ass in Eritrea and Ethiopia is roughly 70 individuals; there may be as many as 600 individuals in these two countries, but this figure is a very rough extrapolation from more intensely studied areas. The number of mature individuals is approximately one-third of the population (Feh et al. 2001), hence the minimum number of mature individuals is 23 and the maximum might be 200. In Ethiopia, in the last 35 years there has been a greater that 95% population decline and in the last 12 years the African Wild Ass has been extirpated from roughly 50% of its range (Kebede et al. 2007). In Eritrea, the population is stable and slowly increasing. However, it is difficult to predict population trends into the future. The desert habitat of the African Wild Ass in both Eritrea and Ethiopia suffers from recurrent and extreme droughts (Kebede 1999).
|Habitat and Ecology:||The primary habitat is arid and semi-arid bushland and grassland. In Eritrea and Ethiopia, the African Wild Ass lives in volcanic landscape of the Great Rift Valley where they range from below sea level in the Dalool Depression to 2,000 m (Moehlman et al. 2013). In Eritrea and Ethiopia, limited observations indicate that African Wild Asses are primarily grazers, but that they will also utilize browse. Typical of arid habitat equids, the only stable groups are composed of a female and her offspring. Females do associate with other females or with males, but even temporary groups are small. Low density and low sociability may be due to low forage quality and availability. In the Mille-Serdo Wild Ass Reserve the preferred forage is Aristida sp., Chrysopogon plumulosus, Dactyloctenium schindicum, Digitaria sp., Lasiurus scindicus, and Sporobolus iocladus (Kebede 1999, Moehlman 2002, Moehlman et al. 2013). In Eritrea, Pannicum turgidium is an important forage species (Teclai 2006).|
|Use and Trade:||The African Wild Ass is hunted for food and medicinal products. It is only hunted at the subsistence level.|
The major threat to the African Wild Ass is hunting for food and medicinal purposes; for example, body parts and soup made from bones are used for treating tuberculosis, constipation, rheumatism, backache, and bone ache (Kebede 1999, Moehlman 2002, Moehlman et al. 2013). Limited access to drinking water and forage (largely due to competition with livestock) is also a major constraint, with reproductive females and foals less than three-months old most at risk. Hence, it will continue to be important to determine critical water supplies and basic forage requirements, allowing management authorities to determine (in consultation with local pastoralists) how to conserve the African Wild Ass (Kebede 1999, 2007; Moehlman 2002; Teclai 2006; Moehlman et al. 2013). The third possible threat to the survival of the African Wild Ass is potential interbreeding with the domestic donkey (Moehlman 2002, Moehlman et al. 2013). However, there is no scientific evidence that indicates hybridization of Equus africanus somaliensis with domestic donkeys (Kebede 2013).
In Ethiopia, the Yangudi-Rassa National Park (4,731 km2) and the Mille-Serdo Wild Ass Reserve (8,766 km2) were established in 1969. However, the former has never been formally gazetted, and both areas are utilized by large numbers of pastoralists and their livestock. These areas are remote and extremely arid, and the Ethiopian Wildlife Conservation Authority (EWCA) has not had sufficient funds or personnel for appropriate management (Kebede 1999). In Eritrea, the government designated the African wild ass area between the Buri Peninsula and the Dalool Depression as a high-priority area for conservation protection as a nature reserve. In both Eritrea and Ethiopia, research and conservation programs (Ministry of Agriculture and EWCA) have been critical for sustaining African Wild Ass populations by involving local pastoralists in their conservation. There are no protected areas in the range of the species in Somalia.
The African Wild Ass is listed as CITES Appendix I in both Ethiopia and Eritrea. Populations of Somali Wild Ass are maintained in captivity (Moehlman 2002, Kebede 2013).
Recommended research and conservation actions, include:
|Citation:||Moehlman, P.D., Kebede, F. & Yohannes, H. 2015. Equus africanus. The IUCN Red List of Threatened Species. Version 2015.2. <www.iucnredlist.org>. Downloaded on 31 August 2015.|
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