Lon&Queta:
Western Diamond-back Rattlesnake (Crotalus atrox); San Pedro River Valley, SE of San Manuel, AZ
Frank Portillo:
Mottled Rock Rattlesnake
Frank Portillo:
Black-Tailed Rattlesnake
Frank Portillo:
Mottled Rock Rattlesnake
Steve Santel:
Southwestern Speckled Rattlesnake