Combat between rattlesnakes (Crotalus viridis
oreganus) in the field.
Reproductive biology of the Northern Pacific Rattlesnake (Crotalus viridis
oreganus) in northern Idaho.
A field observation on the feeding behavior of Crotalus viridis
Seven snake species reported before 1930 (Carphophis vermis, Crotalus viridis
Rain-collecting behavior in a Great Basin rattlesnake (Crotalus viridis
Chemical and behavioral ecology of foraging in prairie rattlesnakes (Crotalus viridis
Regional variation of biochemical characteristics and antigeneity in great basin rattlesnake (Crotalus viridis
Reproduction in the Arizona black rattlesnake, Crotalus viridis
Oochoristica osheroffi has been reported in Crotalus viridis
from Colorado and New Mexico (Widmer and Olsen 1967; Pfaffenberger et al.
in a study conducted on captive prairie rattlesnakes (Crotalus viridis
), Mackessey et al.
Rattlesnakes (e.g., prairie rattlesnakes, Crotalus viridis
viridis) that feed on rodent prey typically release prey immediately following a successful predatory strike, allowing the rodent to flee from the site of envenomation (Estep, Poole, Radcliffe, O'Connell, & Chiszar, 1981; Gans, 1966; Kardong, 1986; O'Connnell, Greenlee, Bacon, & Chiszar, 1982; Radcliffe, Chiszar, & O'Connell, 1980).
Klauber (1949) described Crotalus viridis
caliginis from Isla Sur of Islas de Los Coronados.
Two published estimates of apparent annual survival for North American pit vipers based on robust estimators for timber rattlesnakes Crotalus horridus (Brown et al., 2007) and western rattlesnakes Crotalus viridis
oreganos (Diller and Wallace, 2002) suggest high annual rates of survival (0.820-0.958) for adult terrestrial pit vipers.
This is in contrast to the western rattlesnake, Crotalus viridis
, the western diamondback rattlesnake, Crotalus atrox, the Mojave rattlesnake, Crotalus scutulatus and the tiger rattlesnake, Crotalus tigris in which the major period of spermiogenesis occurs in summer-autnumn (Aldridge 1979a, Jacob et al.
Pacific northwest rattlesnakes (Crotalus viridis
oreganus) struck preferentially this boundary region of rodent prey (Kardong, 1986).