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Natrix
''Natrix'' is a genus of Old World snakes found mainly across Eurasia (although the range of '' Natrix tessellata'' extends into Egypt and those of '' N. astreptophora'' and '' N. maura'' into north-west Africa) in the subfamily Natricinae of the family Colubridae. They are commonly called grass snakes and water snakes, but some other snake species also known commonly as "grass snakes" and "water snakes" are not in the genus. Species The genus ''Natrix'' contains five extant species and at least five extinct (fossil-only) species. ''Nota bene'': A binomial authority in parentheses indicates that the species was originally described in a genus other than ''Natrix''. Etymology ''Natrix'' is classical Latin for a water snake. The word comes from a Proto-Indo-European root meaning "snake", with cognates in the Celtic and Germanic languages, the latter including the English adder. It was probably influenced through folk etymology Folk etymology – also known as (generative) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natrix Natrix
The grass snake (''Natrix natrix''), sometimes called the ringed snake or water snake, is a Eurasian semi-aquatic non-venomous colubrid snake. It is often found near water and feeds almost exclusively on amphibians. Subspecies Many subspecies are recognized, including: ''Natrix natrix helvetica'' ( Lacépède, 1789) was formerly treated as a subspecies, but following genetic analysis it was recognised in August 2017 as a separate species, ''Natrix helvetica'', the barred grass snake. Four other subspecies were transferred from ''N. natrix'' to ''N. helvetica'', becoming ''N. helvetica cettii'', ''N. helvetica corsa'', ''N. helvetica lanzai'' and ''N. helvetica sicula''. The subspecies ''N. natrix astreptophora'', with distribution in the Iberian peninsula, the Pyrenees, and North-Western Africa, has been reclassified as its own species '' Natrix astreptophora'' or the Iberian grass snake. Description The grass snake is typically dark green or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Grass Snake
The grass snake (''Natrix natrix''), sometimes called the ringed snake or water snake, is a Eurasian semi-aquatic non- venomous colubrid snake. It is often found near water and feeds almost exclusively on amphibians. Subspecies Many subspecies are recognized, including: ''Natrix natrix helvetica'' ( Lacépède, 1789) was formerly treated as a subspecies, but following genetic analysis it was recognised in August 2017 as a separate species, ''Natrix helvetica'', the barred grass snake. Four other subspecies were transferred from ''N. natrix'' to ''N. helvetica'', becoming ''N. helvetica cettii'', ''N. helvetica corsa'', ''N. helvetica lanzai'' and ''N. helvetica sicula''. The subspecies ''N. natrix astreptophora'', with distribution in the Iberian peninsula, the Pyrenees, and North-Western Africa, has been reclassified as its own species '' Natrix astreptophora'' or the Iberian grass snake. Description The grass snake is typically dark green or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natrix Parva
''Natrix'' is a genus of Old World snakes found mainly across Eurasia (although the range of '' Natrix tessellata'' extends into Egypt and those of '' N. astreptophora'' and '' N. maura'' into north-west Africa) in the subfamily Natricinae of the family Colubridae. They are commonly called grass snakes and water snakes, but some other snake species also known commonly as "grass snakes" and "water snakes" are not in the genus. Species The genus ''Natrix'' contains five extant species and at least five extinct (fossil-only) species. ''Nota bene'': A binomial authority in parentheses indicates that the species was originally described in a genus other than ''Natrix''. Etymology ''Natrix'' is classical Latin for a water snake. The word comes from a Proto-Indo-European root meaning "snake", with cognates in the Celtic and Germanic languages, the latter including the English adder. It was probably influenced through folk etymology by the Latin ''nare'' and ''natare'' meaning "swim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natrix Astreptophora
''Natrix astreptophora'', the red-eyed grass snake or the Iberian grass snake, is a species of natricine snake found in the Iberian Peninsula, south of France, and some coastal areas in Maghreb, from Tangier to Tunisia. www.reptile-database.org. Long considered a subspecies of the European grass snake, ''Natrix natrix'', the subspecies was split off from that taxon in 2016. Taxonomy The red-eyed grass snake was formally described by the Spanish herpetologist Victor Lopez Seoane in 1903 as ''Natrix astreptophora'' based on specimens from Galicia, Spain (later restricted to A Coruña). The species was subsequently treated as a subspecies in the grass snake complex (''Natrix natrix sensu lato''). The North African populations of the red-eyed grass snake were described as a separate subspecies of the grass snake, ''Tropidonotus natrix algericus'', by the German herpetologist Günther Hecht in 1930. The taxonomy of the grass snake complex remained unsettled throughout the 20th cen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barred Grass Snake
The barred grass snake (''Natrix helvetica'') is a non-venomous colubrid snake from Western Europe, living in and close to water. It was included within the grass snake species, ''Natrix natrix'', until August 2017, when genetic analysis led to its reclassification as a separate species. Subspecies There are currently five subspecies of ''Natrix helvetica'' recognized (having been formerly classified as subspecies of '' N. natrix''): *''N. helvetica helvetica'' (syn. ''N. natrix helvetica'') – most of range *''N. helvetica cetti'' (syn. ''N. natrix cetti'') – Sardinia *''N. helvetica corsa'' (syn. ''N. natrix corsa'') – Corsica *''N. helvetica lanzai'' (syn. ''N. natrix lanzai'') – mainland Italy, but not south *''N. helvetica sicula'' (syn. ''N. natrix sicula'') – Calabria and Sicily Description The barred grass snake has a dark grey-green upper body with characteristic black barring along the flanks. The underparts are pale. It has a distinctive yellow and bla ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dice Snake
The dice snake (''Natrix tessellata'') or water snake is a Eurasian nonvenomous snake in the family Colubridae, subfamily Natricinae. Its average length is . Body color may vary from greyish green to brownish or almost black, with dark spots on the back. The belly is sometimes vividly coloured in yellow or orange, with black spots, very similar to dice, hence the name. Ecology Living mainly near rivers, streams and lakes, it frequently feeds on fish. Sometimes, it feeds also on amphibians such as frogs, toads, and tadpoles. In one instance, a dice snake was even observed trying to feed on an olm (''Proteus anguinus'') that had been flushed from a cave in Bosnia and Herzegovina following heavy rains. However, the snake was far too small to be able to consume the olm. While considered nonvenomous, ''N. tessellata'' produces a potent antihemorrhagin in its serum. As a defence, it spreads a very bad-smelling secretion from its cloaca. Another defence mechanism is thanatosis, pl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Natrix Maura (cropped)
The viperine water snake or viperine snake (''Natrix maura'') is a semiaquatic, fish-eating natricine water snake. Despite its common names, it is not a member of the subfamily Viperinae. It was given its common names due to exhibiting a dorsal colour pattern that superficially resembles that of sympatric adder species. In comparison to other ''Natrix'' species its head is also somewhat wider and more distinct from the neck. Like most members of the Natricinae it possesses a venom gland on each side of the upper jaw (Duvernoy's gland) that produces a mild venom that may play a role in swallowing or digestion. The gland is not associated with an enlarged specialized tooth and the venom has to be applied by chewing. The species usually does not bite as a means of defense, and the effect of a bite would be harmless to humans. Behaviour The viperine snake looks like an adder and occasionally behaves like one. It is known to strike like an adder, but not to bite. It spends most of its ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
