The prairie rattlesnake is common in the dry plains country.
In 1908 there were 8 quarries at Concord, all on Rattlesnake Hill, and all within 2 m.
Poisonous or noxious animals usually have some special advertising attribute, sometimes the display of conspicuous coloration, as in the skunk; sometimes the emission of sound as in the rattlesnake; sometimes a combination of the two, as in the common porcupine and the large black scorpions of Africa and India.
The Reptilia include II species of the crocodile, alligator and lizard, including the savage jacare of the Amazon, several species of turtle, 4 species of batrachians, and 29 species of serpents, including the striped rattlesnake (Crotalus durissus), Lachesis mutus, and a rather rare species of Cophias.
Among venomous snakes the harlequin, or coral snake (Elaps fulvius) is common along the coast; the copperhead (Agkistrodon contortrix) along the wooded banks of creeks and rivers; the cottonmouth (Agkistrodon piscivorus), in all parts of the state except the more arid districts; the "sidewiper," or massasauga (Sistrurus catenatus consors, sometimes called Crotalophorus tergeminus) and the ground rattlesnake (Sistrurus miliarius), in all sections.
The green rattlesnake (Crotalus molossus) inhabits the valley of the Rio Grande; the plains rattlesnake (Crotalus confluentus), the north-western counties; the diamond rattlesnake (C. adamanteus), the wooded river bottoms; the Texas rattlesnake, western Texas and the southern coast counties; the banded rattlesnake, a few widely separated woodland districts.
The ophidians are also very numerous, ranging from the comparatively harmless boa-constrictor to the deadly " palanca " or " fer de lance " (Lachesis lanceolatus) and rattlesnake (Crotalus), of which there are several species.
This low range turns westward in a curve through the Rattlesnake Mountains towards the high Wind River Mountains (Gannett Peak, 3,775 ft.), an anticlinal range within the body of the mountain system, with flanking strata rising well on the slopes.
The Lararnie Plains and the Green river basin, essentially a single structural basic between the east-west ranges of Rattlesnake Mountains on the north and the Uinta Range on the south, measuring roughly 260 m.
Its eastern part is drained north-eastward through a gorge that separates the Laramie and Rattlesnake (Front) ranges by the North Platte river to the Missouri-Mississippi; its western part, where the basin floor is much dissected, often assuming a bad-land expression, is drained southward by the Green river, through a deep canyon in the Uinta Ran~e to the Colorado river and then to the Pacific. The Bighorn basin has a moderately dissected floor, drained north-eastward by Bighorn river through a deep canyon in the range of the same name to the Missouri.
Two species of venomous snakes - the rattlesnake and the copper-head - occur in the sparsely settled regions.
The North American Indians fear lest their venerated rattlesnake should incite its kinsfolk to avenge any injury done to it, and when the Seminole Indians begged an English traveller to rid them of one of these troublesome intruders, they scratched him-as a matter of formin order to appease the spirit of the dead snake.
On the other hand, the " rattlesnake " men of the Moqui are merely transformations and expect to return at death to their original reptile form (Maclennan, 357).
Of reptiles, the rattlesnake and copperhead are the only poisonous species, but numerous harmless varieties are common.
To Edward Jenner we owe the discovery that vaccination protects against smallpox, and it is now generally acknowledged that smallpox and vaccine are ' Quoted by Weir Mitchell, "Researches on the Venom of the Rattlesnake," Smithsonian Contributions (1860), p. 97.
Among the ophidians, which include many harmless species, are the boa-constrictor, rattlesnake, the dreaded Lachesis and the coral snake.
Among the venomous reptiles and insects are the rattlesnake, the Gila monster (Heloderma suspectum), a poisonous lizard, and the tarantula (Mygale Heintzii), which, however, are common only in certain places and at certain seasons.