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Arrows pointing to the pit organs are red; a black arrow points to the nostril. The ability to sense infrared thermal radiation evolved independently in three different groups of snakes, consisting of the families of Boidae (boas), Pythonidae (pythons), and the subfamily Crotalinae (pit vipers). What is commonly called a pit organ allows these ...
The Crotalinae, commonly known as pit vipers, [2] [3] or pit adders, are a subfamily of vipers found in Asia and the Americas. Like all other vipers, they are venomous . They are distinguished by the presence of a heat-sensing pit organ located between the eye and the nostril on both sides of the head.
Like all pit vipers, rattlesnakes have two organs that can sense radiation; their eyes and a set of heat-sensing "pits" on their faces that enable them to locate prey and move towards it, based on the prey's thermal radiation signature. These pits have a relatively short effective range of about 1 ft (0.30 m) but give the rattlesnake a distinct ...
Agkistrodon is a genus of pit vipers commonly known as American moccasins. [3] [4] The genus is endemic to North America, ranging from the Southern United States to northern Costa Rica. [2] Eight species are currently recognized, [5] [6] all of them monotypic and closely related. [7] Common names include: cottonmouths, copperheads, and cantils. [8]
Phylogenetic relationships of Agkistrodon based on Parkinson et al. (2000), [16] modified with updated taxonomy. Recent molecular studies [16] [17] [18] have produced strong evidence indicating that pitvipers made a single invasion into the New World, presumably via the Bering Land Bridge in the early Tertiary or late Cretaceous, with a subsequent divergence resulting in a northern temperate ...
Bothrops is a genus of highly venomous pit vipers endemic to the Neotropics. [1] The generic name, Bothrops, is derived from the Greek words βόθρος, bothros, meaning ' pit ', and ὄψ, ops, meaning ' eye ' or ' face ', together an allusion to the heat-sensitive loreal pit organs.
Bothriechis schlegelii, known commonly as the highland eyelash-pitviper or Schlegel's eyelash-pitviper, [2] is a species of pit viper in the family Viperidae, native to Colombia. Somewhat small, arboreal snakes, B. schlegelii is perhaps best known for the namesake superciliary (" eyelash ") scales above its eyes , and for having distinctly ...
Considered a small viper, growing to 59 cm, the Alashan pitviper is distinguished from similar species by its specific scale counts as well as its banded pattern including 29-43 dark bands. [ 3 ] Habitat