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Saguaro organ pipe cactus and prickly pear cactus, Saguaro National Monument, Tucson, Arizona, USA, North America
Cactus silhouetted against lightning, Tucson, Arizona, United States of America (U.S.A.), North America
Cactus silhouetted against lightning, Tucson, Arizona, United States of America (U.S.A.), North America
Cactus silhouetted against lightning, Tucson, Arizona, United States of America (U.S.A.), North America
Saguaro cactus detail, Tucson, Pima County, Arizona, United States of America, North America
Saguaro cacti and barrel cacti in bloom, Saguaro National Park, Rincon Mountain District, Tucson, Arizona, United States of America, North America
River Otter (Lutra canadensis) in captivity, resting and sucking on its tail, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
Northern Mojave Rattlesnake (Crotalus scutulatus scutulatus) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
Flower of the prickly pear cactus (Opuntia), West-Tucson Mountain District, Saguaro National Park, Arizona, United States of America, North America
Western diamond-back rattlesnake (Western diamondback Rattlesnake) (Crotalus atrox) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
Captive river otter (Lutra canadensis) swimming, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
Harris's hawk (Parabuteo unicinctus) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
Barn owl (Tyto alba) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
Saguaro cacti and barrel cacti in bloom, Saguaro National Park, Rincon Mountain District, Tucson, Arizona, United States of America, North America
Sonoran Desert Sidewinder (Sonoran Sidewinder) (Crotalus cerastes cercobombus) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
Desert Bighorn Sheep (Ovis canadensis nelsoni) ram in captivity exhibiting the Flehmen response, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
Coati (Nasua narica) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
Close up of a common barn owl (Tyto Alba), West-Tucson Mountain District, Saguaro National Park, Arizona, United States of America, North America
Flowers of the Jumping Cholla cactus (Hanging Chain Cholla) (Cylindropuntia Fulgida), West-Tucson Mountain District, Saguaro National Park, Arizona, United States of America, North America
Pima County Courthouse and skyscrapers, Tucson, Pima County, Arizona, United States of America, North America
Saguaro Cactus (Camegiea Gigantea), West-Tucson Mountain District, Saguaro National Park, Arizona, United States of America, North America
Mountain lion (cougar) (Felis concolor) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
Petroglyphs, created by the prehistoric Hohokam people, about 1000 years ago, West-Tucson Mountain District, Saguaro National Park, Arizona, United States of America, North America
Mission San Xavier del Bac, Tucson, Arizona, United States of America, North America
Chili peppers on adobe wall, Tubac, Greater Tucson Region, Arizona, United States of America, North America
Interior of church, Mission San Xavier del Bac, Tucson, Arizona, United States of America, North America
Ocotillo cactus (Fouquieria Splendens) in foreground, Saguaro cactus (Camegiea Gigantea) in background, West-Tucson Mountain District, Saguaro National Park, Arizona, United States of America, North America
Petroglyphs, created by the prehistoric Hohokam people, about 1000 years ago, West-Tucson Mountain District, Saguaro National Park, Arizona, United States of America, North America
Sonoran Desert sidewinder (Sonoran sidewinder) (Crotalus cerastes cercobombus) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
Great Horned Owl (Bubo virginianus) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
Saguaro Cactus (Camegiea Gigantea) silhouetted at sunset, West-Tucson Mountain District, Saguaro National Park, Arizona, United States of America, North America
Petroglyphs, created by the prehistoric Hohokam people, about 1000 years ago, West-Tucson Mountain District, Saguaro National Park, Arizona, United States of America, North America
Saguaro Cactus (Camegiea Gigantea), West-Tucson Mountain District, Saguaro National Park, Arizona, United States of America, North America
Interior of church, Mission San Xavier del Bac, Tucson, Arizona, United States of America, North America
Teddy Bear Cholla cactus (Cylindropuntia Bigelovil), West-Tucson Mountain District, Saguaro National Park, Arizona, United States of America, North America
Saguaro cactus, Saguaro National Park, Tuscon Mountain District west unit, Tucson, Arizona, United States of America, North America
Saguaro Cactus (Camegiea Gigantea) silhouetted at sunset, West-Tucson Mountain District, Saguaro National Park, Arizona, United States of America, North America
Saguaro cacti, Saguaro National Park, Tuscon Mountain District west unit, Tucson, Arizona, United States of America, North America
Decorative fountain in El Presidio Park, Tucson, Arizona, United States of America (U.S.A.), North America
Mission San Xavier del Bac, Tucson, Arizona, United States of America, North America
Mission San Xavier del Bac, Tucson, Arizona, United States of America, North America
The twin towers of St. Augustine Cathedral, Tucson, Arizona, United States of America (U.S.A.), North America
Saguaro cactus, Saguaro National Park, Rincon Mountain District, Tucson, Arizona, United States of America, North America
Saguaro cacti, Saguaro National Park, Tuscon Mountain District west unit, Tucson, Arizona, United States of America, North America
St. Agustine Cathedral, Tucson, Pima County, Arizona, United States of America, North America
Mission San Xavier del Bac, Tucson, Arizona, United States of America, North America
St. Agustine Cathedral, Tucson, Pima County, Arizona, United States of America, North America
Downtown, Tucson, Arizona, United States of America, North America
Saguaro cactus in Tucson Mountain Park, Tucson, Arizona, United States of America, North America
Saguaro cactus, Saguaro National Park, Tuscon Mountain District west unit, Tucson, Arizona, United States of America, North America
San Xavier Mission, Tucson, Arizona, United States of America, North America
Decorative fountain in El Presidio Park, Tucson, Arizona, United States of America (U.S.A.), North America
Sunset Park Fountain, Tucson, Arizona, United States of America, North America
Skyscrapers viewed from Jacome Plaza, Tucson, Arizona, United States of America, North America
Star tracing over cacti, tracing stars as they move round North Star, Tucson, Arizona, United States of America (U.S.A.), North America
Harris's Hawk (Parabuteo unicinctus) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
Captive river otter (Lutra canadensis) swimming, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
Captive ringtail (Bassariscus astutus) at sunset, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
Captive ringtail (Bassariscus astutus) at sunset, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
Ferruginous hawk (Buteo regalis) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
Black-chinned hummingbird (Archilochus alexandri), Sweetwater Wetlands, Tucson, Arizona, United States of America, North America
Adult javalinas (collared peccary) (Pecari tajacu) in the Sonoran Desert suburbs of Tucson, Arizona, United States of America, North America
Flowering cholla cactus (Cylindropuntia spp), in the Sweetwater Preserve, Tucson, Arizona, United States of America, North America
Male Gambel's Quail (Callipepla gambelii) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
Adult California kingsnake (Lampropeltis californiae), Thong Chul, Tucson, Arizona, United States of America, North America
Fruiting saguaro cactus (Carnegiea gigantea), in bloom in June, Sweetwater Preserve, Tucson, Arizona, United States of America, North America
Bobcat (Lynx rufus) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
Sunrise on saguaro cactus in bloom (Carnegiea gigantea), Sweetwater Preserve, Tucson, Arizona, United States of America, North America
Full moon on saguaro cactus (Carnegiea gigantea), Sweetwater Preserve, Tucson, Arizona, United States of America, North America
Sunrise on saguaro cactus in bloom (Carnegiea gigantea), Sweetwater Preserve, Tucson, Arizona, United States of America, North America
Round-tailed ground squirrel (Xerospermophilus tereticaudus), Brandi Fenton Park, Tucson, Arizona, United States of America, North America
Western Screech-Owl (Megascops kennicottii) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
Pied-billed grebe (Podilymbus podiceps), Sweetwater Wetlands, Tucson, Arizona, United States of America, North America
Giant saguaro cactus (Carnegiea gigantea), under full moon in the Catalina Mountains, Tucson, Arizona, United States of America, North America
Giant saguaro cactus (Carnegiea gigantea) at dawn in the Sweetwater Preserve, Tucson, Arizona, United States of America, North America
Giant saguaro cactus (Carnegiea gigantea), under full moon in the Catalina Mountains, Tucson, Arizona, United States of America, North America
Giant saguaro cactus (Carnegiea gigantea) at night in the Sweetwater Preserve, Tucson, Arizona, United States of America, North America
Flowering prickly pear cactus (Opuntia ficus-indica), in the Sweetwater Preserve, Tucson, Arizona, United States of America, North America
Sonoran Desert Sidewinder (Sonoran Sidewinder) (Crotalus cerastes cercobombus) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
Adult javalina (collared peccary) (Pecari tajacu) in the Sonoran Desert suburbs of Tucson, Arizona, United States of America, North America
Sunrise on saguaro cactus in bloom (Carnegiea gigantea), Sweetwater Preserve, Tucson, Arizona, United States of America, North America
Round-tailed ground squirrel (Xerospermophilus tereticaudus), Brandi Fenton Park, Tucson, Arizona, United States of America, North America
Male black-chinned hummingbird (Archilochus alexandri), Sweetwater Wetlands, Tucson, Arizona, United States of America, North America
Giant saguaro cactus (Carnegiea gigantea), under full moon in the Catalina Mountains, Tucson, Arizona, United States of America, North America
Giant saguaro cactus (Carnegiea gigantea), under full moon in the Catalina Mountains, Tucson, Arizona, United States of America, North America
The super full moon rising over saguaro cactus (Carnegiea gigantea), Sweetwater Preserve, Tucson, Arizona, United States of America, North America
The super full moon rising over saguaro cactus (Carnegiea gigantea), Sweetwater Preserve, Tucson, Arizona, United States of America, North America
Round-tailed ground squirrel (Xerospermophilus tereticaudus), Brandi Fenton Park, Tucson, Arizona, United States of America, North America
Hypomelanistic Western Diamond-Back Rattlesnake (Western Diamondback Rattlesnake) (Crotalus atrox) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
Male ruddy duck (Oxyura jamaicensis) swimming, Sweetwater Wetlands, Tucson, Arizona, United States of America, North America
Saguaro cactus (Carnegiea gigantea), photographed at sunrise in the Sweetwater Preserve, Tucson, Arizona, United States of America, North America
Giant saguaro cactus (Carnegiea gigantea), at dawn in the Sweetwater Preserve, Tucson, Arizona, United States of America, North America
Sunrise on saguaro cactus in bloom (Carnegiea gigantea), Sweetwater Preserve, Tucson, Arizona, United States of America, North America
Round-tailed ground squirrel (Xerospermophilus tereticaudus), Brandi Fenton Park, Tucson, Arizona, United States of America, North America
American Kestrel (Sparrow Hawk) (Falco sparverius) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
Giant saguaro cactus (Carnegiea gigantea), under stars in the pre-dawn light, Santa Catalina Mountains, Tucson, Arizona, United States of America, North America
The super full moon rising over saguaro cactus (Carnegiea gigantea), Sweetwater Preserve, Tucson, Arizona, United States of America, North America
Adult captive desert tortoise (Gopherus agassizii) at sunset at the Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America
The super full moon rising over saguaro cactus (Carnegiea gigantea), Sweetwater Preserve, Tucson, Arizona, United States of America, North America
Harris's hawk (Parabuteo unicinctus), Sweetwater Wetlands, Tucson, Arizona, United States of America, North America