What is Adder?
{{Taxobox | image = Loch Shin adder.JPG | image_width = 250px | image_alt = A common adder snake on a slope with [[moss]]es, grasses and other vegetation. Half its body is coiled in a figure of eight to allow striking | regnum = [[Animal]]ia | phylum = [[Chordata]] | subphylum = [[Vertebrate|Vertebrata]] | classis = [[Reptile|Reptilia]] | ordo = [[Squamata]] | subordo = [[Snake|Serpentes]] | familia = [[Viperidae]] | subfamilia = [[Viperinae]] | genus = ''[[Vipera]]'' | binomial = '''''Vipera berus''''' | binomial_authority = ([[Carolus Linnaeus|Linnaeus]], 1758) | status = LC | status_system = iucn3.1 | status_ref = <ref>http://www.iucnredlist.org/apps/redlist/details/157248/1</ref>}} [[File:Hugorme.jpg|right|thumb|250px|alt=Shows the front parts of two common adders. One snake has the normal colour while the other has melanistic color/pattern form. The head of the normal snake is enclosed in a half-coil of the melanistic form.|''V. berus'': normal and melanistic colour patterns]] The '''adder''', ''Vipera berus'' is a [[Poison|venomous]] [[viper]] that can be found throughout most of [[Western Europe]] and all the way to [[East Asia]]. It is the only venomous snake in the [[British Isles]].<ref>Appleby L.G. 1971. ''British snakes''. London: Baker. {{ISBN|0-212-98393-8}}</ref> They are not highly dangerous: the snake is not aggressive and usually only bites when alarmed or disturbed. Bites can be very painful, but they are rarely fatal. The snake is not threatened, though it is protected in some countries. == Description == Adults grow to about 60 centimeters (24&nbsp;in) in length. The largest, at around 90–104 (35–41&nbsp;in), are found in [[Scandinavia]]. In [[France]] and [[Great Britain]], the maximum size is 80–87 centimeters (31–34&nbsp;in), weighing from 50 grams (1.8&nbsp;oz) to about 180 grams (6.3&nbsp;oz). Unusually for snakes, the sexes can be seen by their colour. Females are usually brownish with dark-brown markings, the males are pure grey with black markings. The species has two [[polymorph