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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 ...
This is a list of snake species known to be found in the U.S. state of Illinois. [1] Concerns and listed statuses come from the Illinois Endangered Species Protection Board's February 2011 Checklist of endangered and threatened animals and plants of Illinois and the Illinois Natural History Survey's website. [1] [2]
Eastern diamondback rattlesnake at the Saint Louis Zoo Detail of rattle. The eastern diamondback rattlesnake is the largest rattlesnake species and is one of the heaviest known species of venomous snake, with one specimen shot in 1946 measuring 2.4 m (7.8 ft) in length and weighing 15.4 kg (34 lb).
A python (top) and rattlesnake illustrating the positions of the pit organs. 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 ...
The rattlesnakes seen in the video above are prairie rattlesnakes in Montana. Prairie rattlesnakes can be found from southwestern Canada down through the western U.S. and into northern Mexico.
The species is listed as threatened in Illinois [61] and New York [62] [63] In New York, timber rattlesnakes are "extirpated at 26% of historically known dens, and nearly extirpated at another 5%". [64] Brown (1984, 1988) suggested denning populations in New York have been reduced by 50 to 75% of their historical numbers.
Rattlesnakes are most commonly associated with the rolling deserts and arid scrublands of the American Southwest, but they have a much broader habitat range than many people realize. Though these ...
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