viper, any of a large number of heavy-bodied, poisonous snakes snake, common name for an elongated, limbless reptile of the order Squamata, which also includes the lizards. Most snakes live on the ground, but some are burrowers, arboreal, or aquatic; one group is exclusively marine. In temperate climates they hibernate.
..... Click the link for more information. of the family Viperidae, characterized by erectile, hypodermic fangs. The fangs are folded back against the roof of the mouth except when the snake strikes. Vipers are distributed throughout Eurasia and Africa. They range in size from under 1 ft (30 cm) to nearly 6 ft (2 m) and often have zigzag or diamond patterns. Best known is the common European viper, or adder (Vipera berus), distributed throughout Europe and N Asia. It feeds on small mammals and lizards and hibernates in winter. Its venom is rarely fatal to humans. The asp viper, or asp asp, popular name for several species of viper , one of which, the European asp (Vipera aspis), is native to S Europe. It is also a name for the Egyptian cobra (Naja haja).
..... Click the link for more information. (V. aspis), is a smaller species inhabiting S Europe. The greatest variety of vipers is found in Africa. The brightly patterned Gaboon viper, Bitis gabonica, is the longest of the vipers and has a body diameter of up to 6 in. (15 cm). The puff adder, B. arietans, found over most of Africa and in Arabia, is a highly venomous species whose bite is often fatal. The pit vipers pit viper, poisonous snake of the family Crotalidae, primarily a New World family. Like the Old World true vipers (family Viperidae), pit vipers have long, hollow, erectile fangs that are folded back against the roof of the mouth except when the snake is striking.
..... Click the link for more information. of the Americas, including the rattlesnake rattlesnake, poisonous New World snake of the pit viper family, distinguished by a rattle at the end of the tail. The head is triangular, being widened at the base. The rattle is a series of dried, hollow segments of skin, which, when shaken, make a whirring sound.
..... Click the link for more information. , copperhead copperhead, poisonous snake, Ancistrodon contortrix, of the E United States. Like its close relative, the water moccasin, the copperhead is a member of the pit viper family and detects its warm-blooded prey by means of a heat-sensitive organ behind the nostril.
..... Click the link for more information. , water moccasin water moccasin or cottonmouth, highly venomous snake , Ancistrodon piscivorus, of the swamps and bayous of the S United States. Like the closely related copperhead, it is a pit viper and has a heat-sensitive organ for detecting
..... Click the link for more information. , fer-de-lance fer-de-lance (fĕr'-də-lăns`), highly poisonous snake, Bothrops atrox,
..... Click the link for more information. , and bushmaster bushmaster, large venomous snake, Lachesis muta, of Central America and N South America. It is a member of the pit viper family, which also includes the rattlesnake. The largest New World snake, it reaches a length of 8 to 12 ft (2.5–5.5 m).
..... Click the link for more information. , are classified in a separate family. Vipers are classified in the phylum Chordata Chordata (kôrdā`tə,–dä`–)
..... Click the link for more information. , subphylum Vertebrata, class Reptilia, order Squamata, family Viperidae.

viper

Any of about 200 species (family Viperidae) of venomous snakes in two subfamilies: Viperinae (Old World vipers of Europe, Asia, and Africa) and Crotalinae (pit vipers). Two long, hollow, venom-injecting fangs attached to the movable bones of the viper's upper jaw can be folded back in the mouth when not in use. Vipers range in length from less than 12 in. (30 cm) to more than 10 ft (3 m). They eat small animals and hunt by striking, then trailing, their prey. Many Old World vipers are terrestrial; a few are arboreal or burrowers. Most bear live young.

viper

(or adder) poisonous snake family; puff adder is deadliest of all. [Zoology: NCE, 2898]

See : Deadliness

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viper

viper
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