Jackson's mongoose

Jackson's mongoose (Bdeogale jacksoni) is a species of mongoose belonging to the genus Bdeogale. Discovered in 1889 by Frederick John Jackson, Oldfield Thomas in 1894 described it as Galeriscus jacksoni. It is most closely related to the black-footed mongoose of the same subgenus Galeriscus and both are sometimes united in a single species.

With a head and body length of more than 50 cm (20 in) and a body weight of 2–3 kg (4.4–6.6 lb), it is a large mongoose. Its long and dense fur is grizzled black and white, the cheeks, the throat and the sides of the neck are very yellowish, the legs are dark brown or black, and the bushy tail is white.

Jackson's mongoose feeds on rodents and insects, especially on army ants, and is mainly nocturnal and crepuscular and possibly solitary. Its distributional range in Kenya, Uganda and Tanzania is limited to some arboreous mountain regions. It appears to be rare, and in 2008, the IUCN classified it as Near Threatened.

Jackson's mongoose
Scientific classification
B. jacksoni
Binomial name
Bdeogale jacksoni
Thomas, 1894
Jackson's Mongoose area
Jackson's mongoose range

Body features

Jackson's mongoose is a large mongoose with a bushy tail. Its head and body length is 50.8–57.1 cm (20.0–22.5 in), its tail length is 28.3 to 32.4 centimeters, its hind foot length is 8.6 to 10.8 cm, its ear length is 2.3 to 3.5 cm and its body weight is 2–3 kg.[2] Young but already breeding animals may be markedly smaller than adults. From the black-footed mongoose, it is distinguishable by its much longer fur, especially on the tail, and yellowish tints on the neck and the throat.[3]

The long and dense dorsal fur is grizzled black and white. The dorsal hairs are 20 mm (0.79 in) long with black and white rings. The muzzle and the chin are brownish white and the cheeks, the throat and the sides of the neck are very yellowish. The legs are dark brown or black and the tail is white. The ventral side is light gray and the underfur is dense and woolly. The pinnae are round and broad and the muzzle is blunt. The rhinarium is large, and the hairless extension of the median groove divides the upper lip. The fore and hind feet have only four digits. A hallux and pollex are absent as is common with Bdeogale. The soles are naked, and the claws are thick and strong.[2]

The dentition of Jackson's mongoose is typical for mongooses. Three incisors, one canine, four premolars and two molars are on either side of each jaw. The total number of teeth is 40 and the dental formula is × 2 = 40.[2]

Habitat and habits

The habitats of Jackson's mongoose are montane forests, bamboo zones, and lowland forests in mountain vicinity. Its population density is low.[3] It probably hunts frequently in the thick herbaceous growth around swamps.[1]

Jackson's mongoose is carnivorous, insectivorous and myrmecophagous. In the Aberdare Mountains, the volume of food items in 40 scats was over 50% rodents, including Otomys, Dasymys and Praomys and 40% insects, mostly army ants of the genus Anomma, but also weevils, other beetles and caterpillars. Millipedes, snails, lizards, and the eggs of snakes were also consumed. About 80% of the juveniles' diet were rodents, including Otomys, brush-furred mice, true mice and Praomys. They also fed on beetles, lizards, birds, and a few ants.[2][3] Coping with columns of army ants may depend on maturity and learning, which suggests a recent evolutionary adaptation to this diet.[3]

Jackson's mongoose is mainly nocturnal and crepuscular.[3] In the Udzungwa Mountains, 73% of 25 photos taken by camera traps during the night were shot between 7 p.m. and midnight. It is possibly solitary, but often is seen in pairs and occasionally in groups of four. Nothing is known about its reproduction.[2]


The distributional range of Jackson's mongoose is very limited.[3] It is known from central and southern Kenya, southeastern Uganda and the Udzungwa Mountains 900 km to the south in central Tanzania,[1] where it was first recorded in 2001/02.[4] In the Aberdare Range, the Mount Kenya massif, and the Mount Elgon massif, it occurs at elevations up to 3300 m above sea level.[1] In the Udzungwa Mountains, it seems highly localized and has only been recorded within Matunda Forest at a maximum of 2.65 km apart.[5] It possibly inhabits other massifs of the Eastern Arc Mountains, including the Uluguru Mountains, the Nguru Mountains and the Usambara Mountains.[1]


Jackson's mongoose is usually considered a species of the genus Bdeogale. It is most closely related to the black-footed mongoose (Bdeogale nigripes),[6] from which it is distinguished by skull and skin differences,[7] as whose mountain isolate, it is often treated.[3] Both are sometimes united in the species Bdeogale nigripes[7] or in the subgenus Galeriscus,[8] or they are separated from Bdeogale as distinct genus Galeriscus.[6]

Jackson's mongoose is treated as a separate species by Allen (1939),[9] Rosevear (1974),[10] Corbet and Hill (1980),[11] Honacki et al. (1982),[12] Nowak and Paradiso (1983),[13] Corbet and Hill (1986),[14] Schliemann (1988),[15] Corbet and Hill (1991),[16] Nowak (1991),[17] Wozencraft (1993),[18] Kingdon (1997),[3] Nowak (1999),[8] Pavlinov (2003),[19] Wozencraft (2005),[7] Van Rompaey et al. (2008)[1] and Gilchrist et al. (2009).[2] Kingdon (1977) treats it as a subspecies of the black-footed mongoose[20] and Dücker (1972) also considers them conspecific.[21]

No subspecies of Jackson's mongoose have been described.[7]


Oldfield Thomas in June 1894 described Jackson's mongoose as type species Galeriscus jacksoni of the new genus Galeriscus.[10] He specified the type locality as Mianzini in the land of the Maasai at an elevation of 8000 ft (2438 m) above sea level. Reginald Ernest Moreau, George Henry Evans Hopkins and Robert William Hayman in 1945/46 restricted the type locality at Mianzini to a few miles east-southeast of Lake Naivasha, on the southern end of the Kinangop Plateau and to an elevation of 9000 ft (2743 m).[7]

Frederick John Jackson discovered Jackson's mongoose in 1889[22] and in 1894 sent a skin without skull to the British Museum in London.[23] Led astray by the poor and incomplete type specimen, Thomas originally believed it to be related to the grisons.[24] Paul Matschie in 1895 named it Massaimarder (German, "Maasai marten"),[22] but was the first to recognize it as a Bdeogale.[25] Reginald Innes Pocock in 1916, too, considered Galeriscus a synonym of Bdeogale.[23] Ned Hollister in 1918 assumed it to be a geographic subspecies of the black-footed mongoose.[26]

Population and conservation

Jackson's mongoose occurs in isolated populations and appears to be rare.[2] There are no reliable data on its population, though. The International Union for Conservation of Nature in 2008 classified it as Near Threatened, almost qualifying as Threatened. This was justified with its assumed decline in population size of 20 to 25% within the last 15 years due to habitat destruction. Given its dependence on forest habitat, its main threat is likely to be ongoing forest loss. It was classified as Insufficiently Known in 1988, 1990 and 1994, and as Vulnerable in 1996.[1]

Several populations of Jackson's mongoose are in protected areas, including Aberdare National Park, Mount Kenya National Park, probably Mount Elgon National Park and Udzungwa Mountains National Park. In Tanzania, all confirmed localities are within protected areas. It is also probably more widely distributed than currently known. De Luca and Rovero (2006) recommend the full protection of forests adjacent to the Udzungwa Mountains National Park and a survey of other East African groundwater-dependent forests for its presence.[1]

External links

Literature cited

  • Allen, Glover Morrill (1939). "A Checklist of African Mammals". Bulletin of the Museum of Comparative Zoology. 83: pp.&nbsp, 1–763. ISSN 0027-4100.
  • Corbet, Gordon Barclay; John Edwards Hill (1980). A World List of Mammalian Species. London/Ithaca: British Museum (Natural History)/Comstock Publishing Associates (Cornell University Press). p. 226. ISBN 0-8014-1260-9.CS1 maint: Uses authors parameter (link)
  • Corbet, Gordon Barclay; John Edwards Hill (1986). A World List of Mammalian Species (2nd ed.). New York/London: Facts on File Publications/British Museum (Natural History). p. 254. ISBN 0-565-00988-5.CS1 maint: Uses authors parameter (link)
  • Corbet, Gordon Barclay; John Edwards Hill (1991). A World List of Mammalian Species (3rd ed.). London/New York: Natural History Museum Publications/Oxford University Press. p. 243. ISBN 0-19-854017-5.CS1 maint: Uses authors parameter (link)
  • De Luca, Daniela W.; Noah E. Mpunga (2005). Carnivores of Udzungwa Mountains: Presence, Distributions and Threats (PDF). Mbeya: Wildlife Conservation Society. p. 38.CS1 maint: Uses authors parameter (link)
  • De Luca, Daniela W.; Francesco Rovero (2006). "First records in Tanzania of the Vulnerable Jackson's mongoose Bdeogale jacksoni (Herpestidae)". Oryx. 40 (4): 468–471. doi:10.1017/S0030605306001396. ISSN 0030-6053.CS1 maint: Uses authors parameter (link)
  • Dücker, Gerti (1972). "Schleichkatzen und Erdwölfe". In Rudolf Altevogt; Renate Angermann; Heinrich Dathe; Bernhard Grzimek; Konrad Herter; Detlef Müller-Using; Urs Rahm; Erich Thenius. Grzimeks Tierleben: Enzyklopädie des Tierreichs. Band XII: Säugetiere 3. Zürich: Kindler-Verlag. pp. 144–185.CS1 maint: Uses editors parameter (link)
  • Gilchrist, Jason S.; Andrew P. Jennings; Géraldine Veron; Paolo Cavallini (2009). "Herpestidae (Mongooses)". In Don E. Wilson; Russell A. Mittermeier. Handbook of the Mammals of the World. Volume 1: Carnivores. Barcelona: Lynx Edicions. pp. 262–328. ISBN 978-84-96553-49-1.
  • Hollister, Ned (1918). "East African Mammals in the United States National Museum. Part I: Insectivora, Chiroptera, and Carnivora". Bulletin of the United States National Museum (99): 1–194. ISSN 0362-9236.
  • Honacki, James H.; Kenneth E. Kinman; James W. Koeppl, eds. (1982). Mammal Species of the World: A Taxonomic and Geographic Reference. Lawrence, Kansas: Allen Press/Association of Systematics Collections. p. 694. ISBN 0-942924-00-2.CS1 maint: Uses editors parameter (link)
  • Kingdon, Jonathan (2007) [1997]. The Kingdon Field Guide to African Mammals. London: A&C Black Publishers. p. 476. ISBN 978-0-7136-6513-0.
  • Matschie, Paul (1895). Die Säugethiere Deutsch-Ost-Afrikas. Berlin: Geographische Verlagshandlung Dietrich Reimer. p. 157.
  • Nowak, Ronald M. (1991). Walker's Mammals of the World (5th ed.). Baltimore/London: Johns Hopkins University Press. p. 1629. ISBN 0-8018-3970-X.CS1 maint: Uses authors parameter (link)
  • Nowak, Ronald M. (1999). Walker's Mammals of the World (6th ed.). Baltimore/London: Johns Hopkins University Press. p. 1936. ISBN 0-8018-5789-9.
  • Nowak, Ronald M.; John L. Paradiso (1983). Walker's Mammals of the World (4th ed.). Baltimore/London: Johns Hopkins University Press. p. 1362. ISBN 0-8018-2525-3.CS1 maint: Uses authors parameter (link)
  • Pavlinov, Igor Yakovlevich (2003). [Systematics of Contemporary Mammals]/Систематика современных млекопитающих. Moscow: Moscow State University. p. 297.
  • Pocock, Reginald Innes (1916). "A new genus of African mongooses, with a note on Galeriscus". Annals and Magazine of Natural History. 17 (98): 176–179. doi:10.1080/00222931608693764.
  • Rosevear, Donovan Reginald (1974). The Carnivores of West Africa. London: Trustees of the British Museum (Natural History). p. 548. ISBN 0-565-00723-8.
  • Schliemann, Harald (1988). "Schleichkatzen". In Bernhard Grzimek. Grzimeks Enzyklopädie Säugetiere. Band 6. pp. 186–232.CS1 maint: Uses editors parameter (link)
  • Van Rompaey, Harry; Daniela W. De Luca; Francesco Rovero; Mark Hoffmann (2008). "Bdeogale jacksoni". IUCN Red List of Threatened Species. Version 2009.1. IUCN 2009.
  • Wozencraft, W. Christopher (1993). "Order Carnivora". In Don E. Wilson; DeeAnn M. Reeder. Mammal Species of the World: A Taxonomic and Geographic Reference (2nd ed.). Washington/London: Smithsonian Institution Press. pp. 279–348. ISBN 1-56098-217-9.
  • Wozencraft, W. Christopher (2005). "Order Carnivora". In Don E. Wilson; DeeAnn M. Reeder. Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Baltimore: Johns Hopkins University Press. pp. 532–628. ISBN 0-8018-8221-4.


  1. ^ a b c d e f g h Van Rompaey et al., 2008
  2. ^ a b c d e f g Gilchrist et al., 2009 (p. 319)
  3. ^ a b c d e f g h Kingdon, 1997 (p. 257)
  4. ^ De Luca and Mpunga, 2005 (p. 21)
  5. ^ De Luca and Rovero, 2006 (abstract)
  6. ^ a b Wozencraft, 2005 ("Bdeogale" Archived 2010-06-04 at the Wayback Machine pp. 562–563)
  7. ^ a b c d e Wozencraft, 2005 ("Bdeogale jacksoni" p. 563)
  8. ^ a b Nowak, 1999 (p. 779)
  9. ^ Allen, 1939 (p. 211)
  10. ^ a b Rosevear, 1974 (p. 321)
  11. ^ Corbet and Hill, 1980 (p. 103)
  12. ^ Honacki et al., 1982 (p. 271)
  13. ^ Nowak and Paradiso, 1983 (p. 1049)
  14. ^ Corbet and Hill, 1986 (p. 117)
  15. ^ Schliemann, 1988 (p. 224)
  16. ^ Corbet and Hill, 1991 (p. 112)
  17. ^ Nowak, 1991 (p. 1171)
  18. ^ Wozencraft, 1993 (p. 301)
  19. ^ Pavlinov, 2003 ("Carnivora")
  20. ^ Kingdon, Jonathan (1977). East African Mammals: An Atlas of Evolution in Africa. Volume III, Part A: Carnivores. London: Academic Press. p. 475.CS1 maint: Uses authors parameter (link) Cited in Nowak, 1999 (p. 779)
  21. ^ Dücker, 1972 (p. 176)
  22. ^ a b Matschie, 1895 (p. 85)
  23. ^ a b Pocock, 1916 (p. 179)
  24. ^ Rosevear, 1974 (p. 322)
  25. ^ Matschie, 1895 (p. 147)
  26. ^ Hollister, 1918 (p. 135)
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