Crotalus atrox (Western Diamond-backed Rattlesnake).
Food habits in Oklahoma Crotalus atrox in fall and early spring.
TABLE 1--Total number and percentage of lagomorphs in the diet of adult Crotalus atrox at Montezuma Castle, Tuzigoot, and Tonto national monuments, Arizona.
However, Crotalus atrox females are believed to bear litters each year in Oklahoma (Fitch and Pisani 1993) as do southern populations of the western rattlesnakes, Crotalus viridis (c.
Reproductive activity of male Crotalus atrox and C.
Reproductive tissue was examined from 46 sexually mature female Crotalus atrox specimens from Arizona, and additional data were obtained from gravid females held in the laboratory and from palpation of live snakes in the field.
The western diamond-backed rattlesnake, Crotalus atrox, ranges from southeast California to Arkansas and eastern Texas, Arizona, New Mexico and Oklahoma, south to northern Sinaloa and San Luis Potosi, Mexico (Stebbins 1985).
Table 2 Litter sizes for 29 Crotalus atrox females from Arizona.
Also well represented in the general area is Crotalus atrox
Similar testicular cycles may also occur in Crotalus scutulatus in which spermiogenesis takes place in July-August and Crotalus atrox in which spermiogenesis takes place in August-September (Jacob et al.
Biennial reproductive cycles have been reported for other North American rattlesnakes: Rahn (1942) for Crotalus viridis, Tinkle (1962) for Crotalus atrox and Goldberg (1999) for Crotalus tigris.