Cabeza Prieta National Wildlife Refuge, AZ / Cottontop cactus (Echinocactus polycephalus) with the Cabeza Prieta Mountains in the background at sunset. 42001H8
Cabeza Prieta National Wildlife Refuge, AZ / Cottontop cactus (Echinocactus polycephalus) with off-road vehicle tracks cutting through the desert. 32001V1
Cabeza Prieta National Wildlife Refuge, AZ. / Ocotillos, Fouquieria splendens, with green, crimson and golden coloring at dawn in Pinacate Lava flow. 112001H8
