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1.Lebetine viper (Vipera lebetina): grows to 65 inches. No horn-like scales over the eyes; variable in colour from tan to brown to maroon; belly spotted with dark colour. Terrestrial and may be active any time of day or night, including cool days. 2. Saw-scaled viper (Echis carinatus): Though it rarely grows to even 24 inches in length, this is a highly venomous species responsible for numerous human deaths each year. Because of its fatality rate, this species is listed as one of the most dangerous snakes in the world. The venom is composed of almost equally neurotoxic and haemotoxic components; bite victims typically manifest widespread hemorrhaging and respiratory failure. The vipers are active by day and travel over sand in a sidewinder fashion. When cornered, they inflate the body and rub sections against each other, producing a loud and ominous hissing sound. They strike quickly and repeatedly. 3) Desert horned viper (Cerastes cerastes): Up to 27 inches, another sidewinder that generally has one or two thin spiny horns over each eye (but these are sometimes absent). It is similar in appearance to the saw-scaled viper, but is less aggressive and, though still dangerous, its venom is considerably less toxic than the saw-scaled viper. 4) Persian horned viper (Pseudocerastes persicus) grows to 27 inches, and always has horns over the eyes; these are blunt and made of many smaller scales. Unlike the previous species, the Persian viper is common in rocky areas but rare in loose open sandy regions. The body is pale gunmetal blue to gray with lighter irregular dark blotches. And many more...
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