Ground pangolin

Ground pangolin[1]
A preserved ground pangolin from the collection of The Children’s Museum of Indianapolis.
Conservation status
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Pholidota
Family: Manidae
Genus: Manis
Species: M. temminckii
Binomial name
Manis temminckii
Smuts, 1832
Ground pangolin range

The ground pangolin (Manis temminckii), also known as Temminck's pangolin or the Cape pangolin, is one of four species of pangolins which can be found in Africa, and the only one in southern and eastern Africa. The closest living relatives are Xenarthans, which include anteaters, armadillos, and sloths.[3] The animal was named for the Dutch zoologist Coenraad Jacob Temminck.

Physical Description

Although their outward appearance appears to be reptilian, pangolins are mammals. Depending on the species, pangolin weight varies from 3.5 lbs. (1.6 kg) to 73 lbs. (33 kg) and their length range from 12 to 39 in. Mature adults appear in colors of light brown, olive, and dark brown while young are pale or pink in color. Pangolins are mostly covered in overlapping, protective scales,[3] which makes up about 20% of their body weight.[4] The scales composed of keratin, the same organic material that forms human hair and fingernails,[4] and give pangolins a similar appearance of a pinecone or and artichoke.[5] The underside of a pangolin is not covered with scales, but sparse fur instead. When threatened, it usually will roll up into a ball, thus protecting its vulnerable belly.

Pangolins walk on all four of their stout limbs, which are adapted for digging. Their limbs have five toes each with the forefeet having three long, curved claws, which are designed to demolish termite nests and to dig burrows. Because of these claws, pangolins must balance on the outer edges of their forefeet and tuck in the claws in order to prevent damage. Pangolin have long, broad tails and small, conical heads with jaws that lack teeth. To replace the act of chewing, the pangolin stomach is muscular, with keratinous spines that project into the interior and contains small stones to mash and grind prey, similarly to a bird’s gizzard. Pangolins also have long, muscular tongues to reach and lap up ants and termites in cavities. Their tongues stretch so far they are actually longer than their bodies. The tongue is attached in the lower cavity, near the pelvis and the last pair of ribs, and is able to retract and rest in the chest cavity. Pangolins have no external ears, and therefore poor hearing as well as poor vision, although they do have a strong sense of smell.[3]

Range and Distribution

The African pangolin species are native to 15 African countries dispersed throughout southern, central, and east Africa.[4] M. temminckii is the only species found in southern and eastern Africa. It prefers savannah woodland with moderate amounts of scrub at low elevations.[2]

Behavior and Social Organization

Not much is known about the pangolin, for it is difficult to study in the wild. Pangolins are solitary animals and only interact for mating. They dig and live in deep burrows made of circular chambers. These burrows are very large, large enough for humans to crawl into and stand up. Although it is capable of digging its own burrow, the ground pangolin prefers to occupy those abandoned by warthogs or aardvarks or to lie in dense vegetation, making it even more difficult to observe. African pangolins such as the Ground Pangolin prefer burrows, while Asian pangolin sleep in hallows and forks of trees and logs. They are nocturnal animals and are insectivorous, preying mainly on ants and termites. They mark their territory with urine, secretions, and by scattering their feces. When threatened, their defense mechanism is to curl into a ball with their scale outward, hiss and puff, and lash out with heir sharp edges tails.[3] The scales on the tails are capable of a cutting action in order to inflict serious wounds.[4] Pangolins are also capable of emitting noxious acid from glands near the anus, similar to a skunk, in order to ward of predators.[6] Mainly leopards, hyenas, and humans prey on the ground pangolin.[4] Young pangolin ride on the base of the mother’s tail and slip under the mother when she curls up for protection.

Reproduction and Life Cycles

The lifespan of the pangolin is unknown, however the observed lifespan in captivity is 20 years. Pangolins are sexually dimorphic, with the males being 10-50% heavier than females.[3] There is no defined mating season, however pangolins tend to mate during the summer and autumn months. The gestation period ranges up to 139 days for Ground Pangolin and other African species. African species females usually birth only one offspring, but litters of three have been observed in Asian species. When born, a pangolin has soft, pale scales, which begin to harden by the second day.[3] The young are usually about 6 inches long and about 12 ounces at birth. They are nursed by their mothers for 3 to 4 months, but begin eating termites after only one month.[4] Pangolins reach sexual maturity at 2 years old, which is when they leave their mother and being living in solidarity.[3]

Conservation Status and Threats

The ground pangolin is listed as Vulnerable by the IUCN Red List. The assessors state that “there is an inferred past/ongoing and projected future population reduction of 30-40% over a 27 year period (nine years past, 18 years future; generation length estimated at nine years) based primarily on ongoing exploitation for traditional medicine and bushmeat throughout the species' range and evidence of increased intercontinental trade to Asia.”[2] All eight extant pangolin species are now considered to be threatened with extinction.[7]

The two main threats encountered by ground pangolin populations are habitat loss and illegal trafficking. Due to human cultivation of land, the pangolin faces large amounts of habitat fragmentation and corresponding reduction in numbers.[3] However, illegal trade has an even stronger impact, as pangolins are reported to be the most trafficked animal in the world (with elephants a close second). The scales alone account for 20% of the black market in protected animal parts;[6] they are boiled off the body and used for traditional medicines. Pangolin meat is sold as a high-end delicacy in China and Vietnam, the blood is believed to be a healing tonic, and pangolin fetuses have alleged health benefits and aphrodisiac qualities. A conservative estimate of pangolins trafficked illegally each year is 10,000, while actual numbers for a two-year period may be in excess of 200,000. It is currently unknown how many are left in the wild. Pangolins are generally poorly known to the public and their endangered status has so far received much less publicity than in the case of more iconic species.[5]

Image gallery

References

Wikimedia Commons has media related to Manis temminckii.
Wikispecies has information related to: Manis temminckii
  1. ↑ Schlitter, D. A. (2005). Wilson, D. E.; Reeder, D. M, eds. Mammal Species of the World (3rd ed.). Johns Hopkins University Press. p. 531. ISBN 978-0-8018-8221-0. OCLC 62265494.
  2. ↑ 2.0 2.1 2.2 Pietersen, D., Waterman, C., Hywood, L., Rankin, P. & Soewu, D. (2014). "Manis temminckii". IUCN Red List of Threatened Species. Version 2014.2. International Union for Conservation of Nature. Retrieved 2014-09-04.
  3. ↑ 3.0 3.1 3.2 3.3 3.4 3.5 3.6 3.7 "What is a Pangolin?"
  4. ↑ 4.0 4.1 4.2 4.3 4.4 4.5 African Wildlife Foundation."Pangolin"
  5. ↑ 5.0 5.1 John D. Sutter, "The Most Trafficked Animal You Have Never Heard Of" CNN
  6. ↑ 6.0 6.1 Guy Kelly, "Pangolins: 13 facts about the world's most hunted animal"
  7. ↑ Pangolin Specialist Group (2014). Website of the IUCN-SSC Pangolin Specialist Group <http://www.pangolinsg.org/>

Sources