Close up of head Western hognose snake (Heterodon nasicus), Arizona, USRock Squirrel (Spermophilus variegatus) Arizona, USClose up of Sidewinder rattlesnake (Crotalus cerastes), Arizona USMale Gambel's quail (Callipepla gambelii / Lophortyx gambelii), Organ Pipe Cactus National Monument, Arizona, USBlack tailed jackrabbit (Lepus californicus), Arizona, USMale Nelson's / Desert Bighorn (Ovis canadensis nelsoni) standing in rock face, Arizona, USTwo bobcats (Lynx rufus / Felis rufus) resting in cave, Arizona, USCactus wren (Campylorhynchus brunneicapillus) perched on Chain fruit / Jumping cholla (Cylindropuntia fulgida) Organ Pipe Cactus National Monument, Arizona, USArizona toad (Bufo microscaphus) burrowing in mud and showing the transparent inner eyelid, Arizona, US