ANATEAR

ANATEAR

Anteater is a common name for the four extant mammal species of the suborderVermilingua (meaning "worm tongue") commonly known for eating ants andtermites. The individual species have other names in English and other languages. Together with the sloths, they are within the order Pilosa. The name "anteater" is also colloquially applied to the unrelated aardvark, numbat, echidnas, pangolins and some members of the Oecobiidae.

Extant species are the giant anteater Myrmecophaga tridactyla, about 1.8 m (5 ft 11 in) long including the tail; the silky anteater Cyclopes didactylus, about 35 cm (14 in) long; the southern tamandua or collared anteater Tamandua tetradactyla, about 1.2 m (3 ft 11 in) long; and the northern tamandua Tamandua mexicana of similar dimensions.

All anteaters have elongated snouts equipped with a thin tongue that can be extended to a length greater than the length of the head; their tube-shaped mouths have lips but no teeth. They use their large, curved foreclaws to tear open ant and termite mounds and for defense, while their dense and long fur protects them from attacks from the insects. All species except the giant anteater have a long prehensile tail. 

The anteaters are more closely related to the sloths than they are to any other group of mammals. Their next clGiantosest relations are armadillos. There are four extant species in three genera:

•  anteater (Myrmecophaga tridactyla)
• Silky anteater (Cyclopes didactylus)
• Northern (Tamandua mexicana) and southern tamandua (Tamandua tetradactyla)

Anteater habitats includes dry tropical forests, rainforests, grasslands, and savannas. The silky anteater (Cyclopes didactylus) is specialized to an arboreal environment, but the more opportunistic tamanduas find their food both on the ground and in trees, typically in dry forests near streams and lakes. The almost entirely terrestrial giant anteater (Myrmecophaga tridactyla) lives in savannas. The two anteaters of the genus Tamandua, the southern (Tamandua tetradactyla) and the northern tamanduas (Tamandua mexicana), are much smaller than the giant anteater, and differ essentially from it in their habits, being mainly arboreal. They inhabit the dense primeval forests of South and Central America. The usual colour is yellowish-white, with a broad black lateral band, covering nearly the whole of the side of the body.

The silky anteater (Cyclopes didactylus) is a native of the hottest parts of South and Central America, and about the size of a cat, of a general yellowish color, and exclusively arboreal in its habits.

Silky anteaters and northern tamanduas extend their ranges as far north as southeastern Mexico, while giant anteaters can be found as far north as Central America. Southern tamanduas range south to Uruguay (giant anteaters did also until their recent extirpation there) and the ranges of all species except the northern tamandua overlap in eastern Brazil. Anteaters were confined to South America, which was formerly an island continent, during most of the Cenozoic Era. Once the Isthmus of Panama formed about three million years ago, however, anteaters invaded Central America as part of the Great American Interchange.

Anteaters are specialized to feed on small insects. With each anteater species having its own insect preferences: small species are specialized on arboreal insects living on small branches, while large species can penetrate the hard covering of the nests of terrestrial insects. To avoid the jaws, sting, and other defences of the invertebrates, anteaters have adopted the feeding strategy of licking up large numbers of ants and termites as quickly as possible — an anteater normally spends about a minute at a nest before moving on to another — and a giant anteater has to visit up to 200 nests to consume the thousands of insects it needs to satisfy its caloric requirements. 

The anteater's tongue is covered with thousands of tiny hooks called filiform papillae which are used to hold the insects together with large amounts of saliva. Swallowing and the movement of the tongue are aided by side-to-side movements of the jaws. The tongue is attached to the sternum and moves very quickly, flicking 150 times per minute. The anteater's stomach, similar to a bird's gizzard, has hardened folds and uses strong contractions to grind the insects; a digestive process assisted by small amounts of ingested sand and dirt.