Definitions

pangolin

pangolin

[pang-guh-lin, pang-goh-]
pangolin, armored, toothless mammal of tropical Asia and Africa. Pangolins range in length from 3 to 6 ft (90-180 cm) including the long, broad tail. Their snouts are narrow and pointed. The body is low to the ground and is covered with large, triangular, overlapping scales on the back, the sides, the outer sides of the limbs, and the entire tail. The belly is covered with sparse hair. When threatened, the animal rolls into a ball and erects the scales, points upward, so that it resembles a large pinecone. It also secretes a foul-smelling liquid. Pangolins, also called scaly anteaters, break open logs with their large, powerful claws and use their exceedingly long, slender tongues to lap up the insects on which they feed. Members of some species are tree dwellers and have prehensile, or grasping, tails; others are terrestrial. Pangolins are not closely related to any other living mammals, and their ancestry is not known. There are seven species, all of the genus Manis. In Africa, large numbers of pangolins are killed for their meat and scales by the local inhabitants, and the future of one species, the Cape pangolin, is seriously endangered. Unless protected, the future of three Asian pangolins is also uncertain. They are classified as phylum Chordata, subphylum Vertebrata, class Mammalia, family Manidae, order Pholidota.
or scaly anteater

Any of about eight species of armoured placental mammals (genus Manis, order Pholidota) of tropical Asia and Africa. Scales formed of cemented hairs cover the upper body, legs, and tail. Pangolins are 2–6 ft (60–180 cm) long and weigh 10–60 lb (5–27 kg). They have a conical head, no teeth, a long tongue, short legs, and a long prehensile tail. Some are arboreal; terrestrial species live in burrows. Nocturnal animals, pangolins locate prey, mainly termites, by smell and rip open nests with their front claws. When threatened, the pangolin (Malayan for “rolling over”) curls up or emits an odoriferous secretion. Seealso anteater; echidna.

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Pangolins or scaly anteaters are mammals in the order Pholidota. There is only one extant family (Manidae) and one genus (Manis) of pangolins, comprising eight species. There are also a number of extinct taxa. Pangolins have large keratin scales covering their skin and are the only mammals with this adaptation. They are found in tropical regions of Africa and Asia. The name "pangolin" derives from the Malay word pengguling ("something that rolls up"). Pangolins are nocturnal animals, using their well-developed sense of smell to find insects. The long-tailed pangolin is also active by day. Pangolins spend most of the daytime sleeping, curled up into a ball.

Pangolins were classified with various other orders, for example Xenarthra, which includes the ordinary anteaters, sloths, and the similar-looking armadillos. But newer genetic evidence, indicates that their closest living relatives are the Carnivora, with which they form a clade, the Ferae. Some paleontologists have classified the pangolins in the order Cimolesta, together with several extinct groups.

Physical description and behaviour

The physical appearance of pangolins is marked by large, hardened, plate-like scales. The scales, which are soft on newborn pangolins but harden as the animal matures, are made of keratin, the same material of which human fingernails and tetrapod claws are made. The pangolin is often compared to a walking pine cone or globe artichoke. It can curl up into a ball when threatened, with its overlapping scales acting as armour and its face tucked under its tail. The scales are razor-sharp, providing extra defense. The front claws are so long that they are unsuited for walking, and so the animal walks with its fore paws curled over to protect them. Pangolins can also emit a noxious smelling acid from glands near the anus, similar to the spray of a skunk. Pangolins have short legs, with sharp claws which they use for burrowing into termite and ant mounds, as well as climbing.

The size of pangolins varies by species, ranging from 30 cm to 100 cm (12 to 39 inches). Females are generally smaller than males.

The tongues of pangolins are extremely elongated and extend into the abdominal cavity. By convergent evolution pangolins, the giant anteater, and the tube-lipped nectar bat, all have tongues which are unattached from their hyoid bone and extend past their pharynx deep into the thorax. This extension lies between the sternum and the trachea. Large pangolins can extend their tongues as much as 40 cm (16 inches), with a diameter of only 0.5 cm (1/4 inch).

In pangolins, the section of the brain that relates to problem solving is highly developed. Although their problem solving ability is primarily used to find food in obscure locations, when kept in captivity pangolins are remarkable escape artists..

Arboreal pangolins live in hollow trees, whereas the ground dwelling species dig tunnels underground, up to a depth of 3.5 meters (11 feet). Pangolins are also good swimmers.

Diet

Pangolins lack teeth and the ability to chew. Instead, they tear open anthills or termite mounds with their powerful front claws and probe deep into them with their very long tongues. Pangolins have an enormous salivary gland in their chests to lubricate the tongue with sticky, ant-catching saliva.

Some species, such as the Tree Pangolin, use their strong tails to hang from tree branches and strip away bark from the trunk, exposing insect nests inside.

Reproduction

Gestation is 120-150 days. African pangolin females usually give birth to a single offspring at a time, but the Asiatic species can give birth from one to three. Weight at birth is 80-450 g (3-18 ounces), and the scales are initially soft. The young cling to the mother's tail as she moves about, although, in burrowing species, they remain in the burrow for the first 2-4 weeks of life. Weaning takes place at around three months of age, and pangolins becomes sexually mature at two years.

Threats

Pangolin are hunted and eaten in many parts of Africa and it is one of the more popular types of bush meat. Pangolins are also in great demand in China because their meat is considered a delicacy and some Chinese believe pangolin scales reduce swelling, promote blood circulation and help breast-feeding women produce milk. This, coupled with deforestation, has led to a large decrease in the numbers of Giant Pangolins.

Pangolin populations have suffered from illegal trafficking. In May 2007, for example, Guardian Unlimited reported that 31 pangolins were found aboard an abandoned vessel off the coast of China. The boat contained some 5,000 endangered animals.

The Guardian recently provided a description of the killing and eating of pangolins: "A Guangdong chef interviewed last year in the Beijing Science and Technology Daily described how to cook a pangolin: 'We keep them alive in cages until the customer makes an order. Then we hammer them unconscious, cut their throats and drain the blood. It is a slow death. We then boil them to remove the scales. We cut the meat into small pieces and use it to make a number of dishes, including braised meat and soup. Usually the customers take the blood home with them afterwards.'"

On November 10, 2007, Thai customs officers announced that they had rescued over 100 pangolins as the animals were being smuggled out of the country, en route to China, where they were to be sold for cooking.

Taxonomy

References

External links

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