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The evolutionary history of venomous snakes can be traced back to as far as 28 million years ago. [1] Snake venom is modified saliva used for prey immobilization and self-defense and is usually delivered through highly specialized teeth, hollow fangs, directly into the bloodstream or tissue of the target.
The fangs may reach a length of 55 mm (2.2 in), [4] the longest of any venomous snake. [5] Midbody, the 28–46 dorsal scale rows are strongly keeled except for the outer rows on each side. The lateral scales are slightly oblique. The ventral scales number 124–140, rarely more than 132 in males, rarely less than 132 in females.
The black mamba (Dendroaspis polylepis) is a large and highly venomous snake species native to much of Sub-Saharan Africa. It is the second longest venomous snake species in the world and is the fastest moving land snake, capable of moving at 4.32 to 5.4 metres per second (16–20 km/h, 10–12 mph).
The first three or four sublabials contact the chin shields, of which only one pair exists. Often, two fangs are on each maxilla, and both can be functional. [4] [7] Midbody, the snake has 29–41 rows of dorsal scales. These are strongly keeled except for the outermost rows. The ventral scale count is 123–147, the subcaudals number 14–38 ...
The eastern brown snake's fangs are small compared to those of other Australian venomous snakes, averaging 2.8 mm (0.11 in) in length or up to 4 mm (0.16 in) in larger specimens, and are 11 mm (0.43 in) apart. [28] The tongue is dark. [29] The iris is blackish with a paler yellow-brown or orange ring around the pupil.
Tiger snakes, named after their colored stripes, are among the most venomous snakes in the world, according to the state's wildlife department. ... "Fangs on the freeway." ...
Their fangs rarely have enough venom to kill a human but commonly cause painful swelling and discoloration. ... Venomous snakes have vertical-slitted pupils and nonvenomous snakes have round pupils.
The common krait (Bungarus caeruleus) is a venomous snake species belonging to the genus Bungarus in the Elapidae family. It is native to the Indian subcontinent and is responsible for the majority of snakebites affecting humans in India , Pakistan , and Bangladesh .