Rattlesnakes; Their Habits, Life Histories, and Influence on Mankind: Introduction

adamanteus adult areas Arizona atricaudatus atrox average basiliscus blotches body captivity catenatus cent cerastes coil color Crotalus mitchelli Crotalus ruber Crotalus triseriatus Crotalus viridis dens desert diamond rattlesnake differences dorsal dorsal scale enyo feet females genus Crotalus Gloyd ground head helleri hibernation horridus inches intermedius Island Klauber laterorepens length lepidus lizards lobe loreal lucasensis lutosus male mammals massasauga mating Mexico miliarius mitchelli Mojave molossus Mountains northern Pacific rattlesnake observed oreganus Pacific rattler pattern posterior prairie rattlesnakes preocular prey pricei pyrrhus range rattle rattler Rattlesnake Fig red diamond reported rock ruber San Diego County San Diego Soc scale rows scutulatus segment shedding sidewinder Sistrurus skin snakes South southern species speckled rattler speckled rattlesnake squirrel strike strings subspecies supralabials supraoculars tail temperature terrificus timber rattlesnake triseriatus Type locality type specimen U. S. Forest Service unicolor usually venomous venomous snakes ventral vipers western diamond willardi young Zoöl