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However, rat snake bites are not dangerous to humans. Like nearly all colubrids, rat snakes pose no threat to humans. Rat snakes were long believed to be completely nonvenomous, but recent studies have shown that some Old World species do possess small amounts of venom, though the amount is negligible relative to humans. [1]
Yellow rat snake, Pantherophis alleghaniensis ssp. quadrivittata, in Florida. Adult eastern rat snakes commonly measure 90 to 183 cm (2 ft 11 in to 6 ft 0 in) in total length (including tail), with a few exceeding 200 cm (6 ft 7 in). [12] The longest recorded total length to date for an eastern rat snake is 228 cm (7 ft 6 in). [11]
P. ventromaculatus is a graceful snake with a smooth, round, elongate, gradually tapering body, and a tail more than one-fourth the total length. It has a moderately narrow head. It varies in colour and can be grey, olive-brown, olive-green, or dirty yellow. It has a series of black rhomboidal cross-bars running down the middle of the back.
Ptyas is a genus of colubrid snakes. [1] This genus is one of several colubrid genera colloquially called "rat snakes" or "ratsnakes".. The generic name derives from Ancient Greek πτυάς, meaning "spitter", which referred to a kind of snake believed to spit venom in the eyes of humans, although in reality none of the Ptyas are known to spit venom.
Pantherophis emoryi, commonly known as the Great Plains rat snake, is a species of nonvenomous rat snake in the family Colubridae. The species is native to the central part of the United States , from Missouri to Nebraska , to Colorado , south to Texas , and into northern Mexico .
Pantherophis obsoletus, also known commonly as the western rat snake, black rat snake, pilot black snake, or simply black snake, [4] is a nonvenomous species of snake in the family Colubridae. The species is native to central North America. There are no subspecies that are recognized as being valid. [5] Its color variations include the Texas ...
Dowling and Price (1988) placed this snake in its own genus, Bogertophis, based on immunological data, but complications with the data set and the mode of analysis indicated that it was best to regard this species as a member of the rat snake genus, Elaphe, until further data became available (L. Grismer and John Wright, pers. comm.).
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