The Mexican lance-headed rattlesnake or lance-headed rattlesnake (Crotalus polystictus) is a venomous pit viper species found in central Mexico. No subspecies...

has lost its rattle entirely, Crotalus lorenzoensis usually has no rattle, and both Crotalus ruber lucasensis and Crotalus estebanensis exhibit a tendency...

central Mexico Crotalus polystictus, a.k.a. the Mexican lance-headed rattlesnake, a venomous pitviper species found in central Mexico Crotalus triseriatus...

1853 Crotalus oreganus Holbrook, 1840 Crotalus ornatus Hallowell, 1854 Crotalus polystictus (Cope, 1865) Crotalus pricei Van Denburgh, 1895 Crotalus pusillus...

rattlesnake Crotalus oreganus oreganus, Northern Pacific rattlesnake Crotalus ornatus, Eastern black-tailed rattlesnake Crotalus polisi Crotalus polystictus, Mexican...

vibrations per second (Bothriopsis taeniata) to 91 rattles per second (Crotalus polystictus). In the study, only two rattlesnakes (of 33 individuals filmed)...

from the western diamondback (Crotalus atrox), eastern diamondback (Crotalus adamanteus), South American rattlesnake (Crotalus durissis terrificus), or fer-de-lance...

oreganus Crotalus ornatus Crotalus polisi Crotalus polystictus Crotalus pricei Crotalus pusillus Crotalus pyrrhus Crotalus ravus Crotalus ruber Crotalus scutulatus...

(Crotalus polystictus)‡ Red spitting cobra (Naja pallida) Reticulated python (Malayopython reticulatus) Santa Catalina Island rattlesnake (Crotalus catalinensis)‡...

peregrinus), Montezuma quail (Cyrtonyx montezumae), and the snakes Crotalus polystictus and Crotalus triseriatus. The area was designated a protected forest area...