Snail Physical Characteristics Habitat Diet Reproduction

The name snail applies to most members of the molluscan Class Gastropoda that have coiled shells. Other gastropods, which lack a conspicuous shell, are commonly called slugs, and are scattered throughout groups that primarily include snails. Snails are found in freshwater, marine, and terrestrial environments. While most people are familiar with only terrestrial snails, the majority of snails are not terrestrial. Snails with lungs belong to the group Pulmonata, while those with gills belong to the Paraphyletic group.

1 Physical Characteristics

Snails move like worms by alternating body contractions with stretching, with a proverbially low speed (hence the term snail mail for postal services). They produce mucus in order to aid locomotion by reducing friction. The mucus also reduces the snail's risk of injury and helps keep away potentially dangerous insects like antFormicomorph subfamilies Aneuretinae Dolichoderinae Formicinae e. Formica Myrmeciomorph subfamilies Myrmeciinae eg. Myrmecia Pseudomyrmecinae Dorylomorph subfamilies Cerapachyinae Ecitoninae Leptanilloidinae Aenictinae Dorylinae Aenictogitoninae Leptanills. When retracted into their shells, snails cover the entrance with a 'trapdoor' like structure called an operculumIn Biology operculum (Latin for "little lid") has been used to describe several completely separate features. Gastropods The operculum (plural : opercula or operculums) of gastropods is a corneous plate at the opening of the shell, attached dorsally to th.

In winter some snail species hibernate in their shells by closing the opening with a thin shell-like plate that they build only for this use and destroy in spring. Even some slug species build a shell-like object below their upper skin.

Snails come in a range of different sizes. The largest land snail is the Giant African Snail (Achatina fulica; Family AchatinidaeThe Family Achitinidae is a taxonomic grouping of terrestrial snails from Africa. The family includes some 11 genera. Achatina achatina Linnaeus, 1758 or Giant African Snail Agate Snail or Ghana Tiger Snail, from Western Africa ( Liberia through Nigeria)), which can measure up to 30cm. Pomacea maculata (Family AmpullariidaePomacea canaliculata with extended siphon''. The Family Ampullariidae (Pilidae)—commonly referred to as Apple Snails are tropical and subtropical freshwater mollusks. The Ampullariidae includes several genera: Asolene Felipponea Marisa and Pomacea are New), or Giant Apple Snail is the largest freshwater snail, with its size reaching 15 cm diameter and over 600 g weight. The biggest of all snails is Syrinx aruanus, a marine species living in AustraliaAustralia is the sixth-largest country in the world (geographically), the only one to occupy an entire continent, and the largest in the region of Australasia. Australia includes the island of Tasmania, which is an Australian State. Its neighbouring count. Shell lengths up to 1 m have been reported.

Snail shells, like those of the NautilusThis article is about an order of mollusks. See Nautilus (disambiguation) for more terms. Allonautilus perforatus Allonautilus scrobiculatus Nautilus belauensis Nautilus macromphalus Nautilus pompilius pompilius Nautilus pompilius suluensis Nautilus steno, are an example of the appearance of the phi, the golden ratio, in nature. Patterns on shells of certain sea snails ( Conus , Cymbiola ) are formed by biological version of cellular automata.

2 Habitat

As one of the largest classes of animals, snails can be found throughout the world. They are found in freshwater, marine, and terrestrial environments. The majority of the world's snails live in the oceans and new species are being discovered regularly. Terrestrial snails prefer damp areas around vegetation which they can use for cover during the day.

3 Diet

A snail's diet varies by species. Terrestrial snails such as garden snails generally eat young plant shoots or bark, or decaying vegetative matter. Carnivorous snails, such as the Decollate Snail feed on other snails. Snails eat by using their radula, or scraping tongue, to shear their food.

4 Reproduction

Snails, like many worms, are hermaphrodites, producing both sperm and eggs. Prolific breeders, snails exchange sperm with one another to fertilize their eggs. Each brood may consist of up to 100 eggs.

Garden snails bury their eggs in shallow topsoil primarily while the weather is warm and damp. After 2 to 4 weeks of favorable weather, these eggs hatch and the young emerge. Snails may lay eggs as often as once a month.

5 Predators

Snails have many natural predators, including ground beetles, snakes, toads, turtles, and birds like chickens, ducks and geese. Snails are also eaten by people in several countries of Europe, where they are considered a delicacy. Snails as a food are commonly referred to by the French word escargot. The two commonly eaten species are the Burgundy snail (Helix pomatia) and the brown garden snail (Helix aspersa) also known as the European brown snail .

6 Control (Garden Pests)

Terrestrial snails and slugs are generally both migratory and nocturnal, thus difficult to control. Common methods of control include shallow dishes filled with beer, and the use of molluscicides.

7 External links

Snail also refers to a chess engine. See Snail (chess) .

Molluscs Gastropods

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