Cobra is the common name of various snakes, most of which belong to the genus Naja.
The Homalopsidae are a family of snakes which contains about 28 genera and more than 50 species. They are commonly known as Indo-Australian water snakes, mudsnakes, or bockadams. They are also known as ular air in Indonesian. They are typically stout-bodied water snakes, and all are mildly venomous. Two monotypic genera are notable for their unusual morphology: Erpeton possesses a pair of short, fleshy appendages protruding from the front of the snout, and Bitia has uniquely enlarged palatine teeth. Cerberus species have been noted to use sidewinding to cross slick mud flats during low tide. Fordonia and Gerarda are the only snakes known to tear their prey apart before eating it, pulling soft-shelled crabs through their coils to rip them apart prior to ingestion.
The grass snake, 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.
Hydrodynastes gigas is a New World species of large, rear-fanged, Dipsadin snake endemic to South America. It is commonly and alternatively known as the false water cobra and the Brazilian smooth snake. The false water cobra is so named because when the snake is threatened it "hoods" as a true cobra does. Unlike a true cobra, though, it does not rear up, but remains in a horizontal position. No subspecies are currently recognized as being valid.
Natrix is a genus of Old World snakes found across Eurasia in the subfamily Natricinae of the family Colubridae.
The brown-banded water snake is a species of aquatic snake found in tropical South America and Trinidad and Tobago. It is also known as the water mapepire.
Dieurostus is a genus of snake in the family Homalopsidae. The genus Dieurostus is monotypic, containing only the species Dieurostus dussumieri, commonly known as Dussumier's water snake, or the Kerala mud snake. The species, which is mildly venomous and rear-fanged, is endemic to Kerala, in southwestern India. It was formerly thought to be found in Bangladesh, although its distribution there is now disputed.
The rice paddy snake, also known as grey water snake, Boie's mud snake, yellow or orange bellied water snake, lead water snake or plumbeous water snake is a species of mildly venomous, rear-fanged snake endemic to South Asia. It is somewhat common, and is one of the most widespread species of water snake in Asia.
Nerodia is a genus of nonvenomous colubrid snakes commonly referred to as water snakes due to their aquatic behavior. The genus includes nine species, all native to North America.
Nerodia rhombifer, commonly known as the diamondback water snake, is a species of nonvenomous natricine colubrid endemic to the central United States and northern Mexico. There are three recognized subspecies of N. rhombifer, including the nominotypical subspecies.
The Natricinae are a subfamily of colubroid snakes, sometimes referred to as a family (Natricidae). The subfamily comprises 36 genera. Members include many very common snake species, such as the European grass snakes, and the North American water snakes and garter snakes. Some Old World members of the subfamily are known as keelbacks, because their dorsal scales exhibit strong keeling.
The dice snake is a Eurasian nonvenomous snake belonging to the family Colubridae, subfamily Natricinae. It is also called water snake.
The Chinese water snake, Chinese smooth water snake, Chinese mud snake or Chinese rice paddy snake is a species of mildly venomous, rear-fanged snake, endemic to Asia.
In the 10th edition of Systema Naturae, Carl Linnaeus described the Amphibia as:
Animals that are distinguished by a body cold and generally naked; stern and expressive countenance; harsh voice; mostly lurid color; filthy odor; a few are furnished with a horrid poison; all have cartilaginous bones, slow circulation, exquisite sight and hearing, large pulmonary vessels, lobate liver, oblong thick stomach, and cystic, hepatic, and pancreatic ducts: they are deficient in diaphragm, do not transpire (sweat), can live a long time without food, are tenatious of life, and have the power of reproducing parts which have been destroyed or lost; some undergo a metamorphosis; some cast (shed) their skin; some appear to live promiscuously on land or in the water, and some are torpid during the winter.
Keelback may refer to any of the following snake genera:
Helicops is a genus of snakes of the family Colubridae. The genus is endemic to South America.
Hebius boulengeri is a species of snake in the family Colubridae. The species is native to East Asia and Southeast Asia. It is also known commonly as the Tai-yong keelback or Boulenger's keelback.
Subsessor is a genus of snake in the family Homalopsidae. The genus is monotypic, containing the sole species Subsessor bocourti. The species is commonly known as Bocourt's mud snake or Bocourt's water snake and has traditionally been placed in the genus Enhydris.
Pseudoferania is a genus of snake in the family Homalopsidae. The genus is monotypic, containing the sole species Pseudoferania polylepis. The snake is found in Australia and New Guinea.
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