|Scientific Name:||Hylochoerus meinertzhageni|
|Species Authority:||Thomas, 1904|
|Taxonomic Notes:||Following Grubb (1993, 2005) and d'Huart and Kingdon (2013), three subspecies are provisionally recognized: Hylochoerus. m. ivoriensis, which occurs as isolated populations from Guinea to southern Ghana; H. m. rimator, which ranges from southeast Nigeria to eastern Democratic Republic of the Congo; and the nominate race H. m. meinertzhageni (the true Giant Forest Hog), which occurs as scattered populations from the Albertine Rift Highlands of eastern Democratic Republic of the Congo to the eastern (Gregory) Rift Valley in Ethiopia and Kenya. Groves and Grubb (2011) supported by Gongora et al. (in prep.) reviewed this classification and suggested that a species-level status be assigned to these three subspecies. However, further genetic and morphometric studies are required in order to fully understand the taxonomy of the Forest Hog, particularly because the taxonomic status of the Ethiopian race is still indefinite.|
|Red List Category & Criteria:||Least Concern ver 3.1|
|Assessor(s):||d'Huart, J. & Reyna, R.|
Listed as Least Concern as the species is relatively widespread, sometimes locally abundant with a high reproductive potential, and, although it is subject to hunting in many parts of its range, it is not believed to be declining at a rate that would merit listing either as Near Threatened or in a threatened category. However, it is acknowledged that there is a general decreasing trend for the species across its range. If national hunting regulations are not adequately adapted to the local populations status, this might eventually represent a threat in some countries where the species is targeted as hunting trophy. Today, the status of the species may be more alarming than actually classified because two of the subspecies present very fragmented populations. H. m. ivoriensis is cause of concern given the high rates of forest loss and fragmentation in the West Africa countries and live in isolated subpopulations from Guinea to Southern Ghana, but information to substantiate this is insufficient (d’Huart and Kingdon 2013). A specific investigation on its status and on the conservation measures needed is therefore urgently warranted. H. m. meinertzhageni has probably disappeared from Rwanda and Burundi, and in Uganda it may be confined to some protected areas in the Western part of the country. In Kenya, Ethiopia and South Sudan Forest hogs live also in very fragmented populations.
|Previously published Red List assessments:|
|Range Description:||At continental scale, the Forest Hog has a range similar in many respects to the Bongo Tragelaphus eurycerus, being distributed in scattered populations throughout undisturbed tracts of lowland rainforest in West Africa and on the right bank of the Congo River, and also present in highland mixed forests of the Albertine Rift, and in isolated montane forests in Kenya and Ethiopia (d'Huart and Kingdon 2013). Contrary to previous accounts, the presence of the species has not been confirmed in Tanzania (Grimshaw 1998, Kock and Howell 1999). It is believed to be extinct in Equatorial Guinea, and there have been no records of Forest Hog from Rwanda since the late 1980s (R. Dowsett pers. comm.), though they might still survive in the Nyungwe/Kibira Forest straddling Rwanda and Burundi (Meijaard et al. 2011).|
Native:Cameroon; Central African Republic; Congo; Congo, The Democratic Republic of the; Côte d'Ivoire; Ethiopia; Gabon; Ghana; Guinea; Kenya; Liberia; Nigeria; Sierra Leone; Sudan; Uganda
Regionally extinct:Equatorial Guinea (Equatorial Guinea (mainland))
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||The Forest Hog occurs at low density over most of its range, but sometimes locally abundant and at high densities. In DRC, d'Huart (1978) recorded densities of 0.4/km2 in Garamba National Park to 2.6 /km2 in the central plain of Virunga National Park. On the Mweya Peninsula, Queen Elizabeth National Park, Uganda, density was reported as >10 km2 in 1999. However, Klingel and Klingel (2004) subsequently recorded a 30% fall in the density mainly as a result of high predation. This population had subsequently declined further and was close to extinction (H. Klingel pers. comm. 2007). In Kibale National Park, Uganda, Reyna-Hurtado and collaborators tracked two groups of Forest hog inhabiting forest clearing surrounded by mature and logged montane forest and estimated a density of 1.02 ind/km2 (Reyna-Hurtado et al. 2014).|
|Current Population Trend:||Decreasing|
|Habitat and Ecology:|
Throughout its range, the Forest Hog inhabits a wide variety of forest types, ranging from subalpine areas and bamboo groves through montane to lowland and swamp forests, galleries, wooded savannas and post-cultivation thickets. It shows a preference for a convenient and permanent water source, thick understorey cover in some parts of the home range, and a diversity of vegetation types. The variety of forest habitats occupied implies a high degree of adaptability to local climatic conditions (d'Huart and Kingdon 2013). For example in Kibale National Park (Uganda) they select dense thickets of shrubs, mainly composed of Mimulopsis spp,. Acanthus pubescens, and Piper spp. surrounded by mature or logged forest but the species occasionally visits swampy areas and mature forest (Reyna-Hurtado et al. 2014).
|Use and Trade:||
In some areas of the Congo Basin, Forest Hogs are avoided by shotgun hunters because their flesh is considered to have an unpleasant taste, but this is by no means a widespread aversion (d'Huart and Kingdon 2013). Hogs are sometimes caught in snares and the meat is smoked to conceal its origin and sent to urban markets (d'Huart and Kingdon 2013). Despite its large size, the meat of Forest Hog is an uncommon sale in bushmeat markets (Davies and Brown 2007) but in some parts of its range where density is still high, the species is considered at risk from overexploitation in the illegal bushmeat trade and has been elevated from partially protected to integrally protected in 2011 (PALF 2016).
|Major Threat(s):||Forest Hogs are very vulnerable to deforestation and, to a lesser extent, to hunting for food. Deforestation, hunting and other forms of disturbance wherever people have access to forest areas have led to the local decrease and/or extinction of populations, notably in Guinée (D. Brugière pers. comm.), Bwindi and Murchison National Park in Uganda (Tumukunde pers. comm) and Ethiopia (J. Roussos pers. comm.). Diseases and parasites transmission may also represent significant threats that remain largely unknown in its effects on populations.|
|Conservation Actions:||Forest Hogs occur in a number of major protected areas, including: Haut Niger National Park (Guinée); Sapo National Park (Liberia); Taï National Park (Côte d’Ivoire); Bia National Park (Ghana); Minkebe National Park (Gabon); Odzala National Park (Congo Republic); the Sangha Tri-National complex (Central African Republic, Congo, Cameroon); Bili-Uere Hunting Reserve, Okapi Faunal Reserve, Garamba National Park, Maiko National Park, Virunga National Park and Kahuzi-Biega National Park (DRC); Ruwenzori National Park, Kibale National Park and Queen Elizabeth National Park (Uganda); Aberdares National Park, Mt Kenya National Park and Masai Mara National Park (Kenya); and Bale Mountains National Park (Ethiopia). It is also present and locally abundant in hunting concessions in Cameroon, Central African Republic and Ethiopia.|
Davies, G. and Brown, D. 2007. Bushmeat and Livelihoods: Wildlife Management and Poverty Reduction. Wiley-Blackwell, New York.
D'Huart, J.P. 1978. Écologie de l'hylochère (Hylochoerus meinertzhageni Thomas) au Parc National des Virunga. Exploration PNV. Deuxième Série. Fondation pour Favoriser les Recherches Scientifiques en Afrique. Bruxelles.
D'Huart, J.P. and Kingdon, J. 2013. Hylochoerus meinertzhageni. In: J. Kingdon and M. Hoffmann (eds), Mammals of Africa. Volume VI: Pigs, Hippopotamuses, Chevotain, Giraffes, Deer and Bovids, Bloomsbury Publishing, London.
Gongora, J., Groves, C.P., and Meijaard, E. In prep. Evolutionary relationships and taxonomy of Suidae and Tayassuidae. In: M. Melletti and E. Meijaard (eds), Ecology, Evolution and Management of Wild pigs and Peccaries. Implications for Conservation.
Grimshaw, J.M. 1998. The giant forest hog Hylochoerus meinertzhageni in Tanzania- records rejected. Mammalia, Paris 62(1): 123-125.
Groves, C. and Grubb, P. 2011. Ungulate Taxonomy. The Johns Hopkins University Press, Baltimore, USA.
Grubb, P. 1993. The Afrotropical Suids Phacochoerus, Hylochoerus and Potamochoerus - Taxonomy and Description. In: W.L.R. Oliver (ed.), Pigs, peccaries and hippos. Status survey and conservation action plan, pp. 66-75. IUCN/SSC Pigs and Peccaries Specialist Group and IUCN/SSC Hippo Specialist Group, Gland, Switzerland.
Grubb, P. 2005. Artiodactyla. In: D.E. Wilson and D.M. Reeder (eds), Mammal Species of the World. A Taxonomic and Geographic Reference (3rd ed), pp. 637-722. Johns Hopkins University Press, Baltimore, USA.
IUCN. 2016. The IUCN Red List of Threatened Species. Version 2016-1. Available at: www.iucnredlist.org. (Accessed: 30 June 2016).
Klingel, H. and Klingel, U. 2004. Giant Forest Hog Hylochoerus meinertzhageni in Queen Elizabeth National Park, Uganda. Suiform Soundings 4(1): 24-25.
Kock, D. and Howell, K.M. 1999. The Enigma of the Giant Forest Hog, Hylochoerus meinertzhageni (Mammalia: Suidae), in Tanzania Reviewed. Journal of East African Natural History 88(1): 25-34.
Meijaard, E., d'Huart, J.P. and Oliver, W.L.R. 2011. Family Suidae (Pigs). In: Wilson, D.E. and Mittermeijer, R.A. (eds), Mammals of the World, Lynx Edicions, Barcelona.
PALF. 2016. Giant forest hog. Available at: http://palf-enforcement.org/congo/protected-species-in-republic-of-congo/giant-forest-hog/. (Accessed: 10 February 2016).
Reyna-Hurtado, R., Tumukunde, A., Chapman, C.A., Rojas-Flores, E., Sanvicente, M., Sengupta, R. and Calme, S. 2014. On the track of the Giant Forest Hog in Kibale National Park, Uganda: a preliminary report on studying the species. Suiform Soundings 12: 38-41.
|Citation:||d'Huart, J. & Reyna, R. 2016. Hylochoerus meinertzhageni. The IUCN Red List of Threatened Species 2016: e.T41769A44140722.Downloaded on 30 June 2016.|
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