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Green Sea Turtle (Chelonia Mydas) coming out of the sea near Hat Mai Khao, Phuket Province, Thailand

Galapagos Lava Lizard (Microlophus albemarlensis), Hispanola Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Northern Mojave Rattlesnake (Crotalus scutulatus scutulatus) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America

Alligator (Yacare caiman), Pantanal Conservation Area, UNESCO World Heritage Site, Brazil, South America

Male Mwanza flat-headed agama (Agama mwanzae), Serengeti National Park, Tanzania, East Africa, Africa

Male Mwanza flat-headed agama (Agama mwanzae), Serengeti National Park, Tanzania, East Africa, Africa

Marine iguana (Amblyrhynchus cristatus), Suarez Point, Isla Espanola (Hood Island), Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

A hawksbill turtle (Eretmochelys imbricata), swims over a reef in the Pacific Ocean, Philippines, Southeast Asia, Asia

Green sea turtle getting its shell cleaned by goldring surgeonfish off Maui, Hawaii, United States of America, Pacific, North America

A hawksbill sea turtle (Eretmochelys imbricata), in a colorful overhang on a reef in the Koro Sea, Fiji, South Pacific, Pacific

Western diamond-back rattlesnake (Western diamondback Rattlesnake) (Crotalus atrox) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America

Snake Temple (Mwe Paya) between Dalah and Twante, across the river from Yangon, Myanmar (Burma), Asia

San Esteban spiny-tailed iguana (Ctenosaura conspicuosa) on cardon cactus, Isla San Esteban, Gulf of California (Sea of Cortez), Baja California, Mexico, North America

San Esteban spiny-tailed iguana (Ctenosaura conspicuosa) on cardon cactus, Isla San Esteban, Gulf of California (Sea of Cortez), Baja California, Mexico, North America

San Esteban spiny-tailed iguana (Ctenosaura conspicuosa) eating smaller lizard, Isla San Esteban, Gulf of California (Sea of Cortez), Baja California, Mexico, North America

San Esteban spiny-tailed iguana (Ctenosaura conspicuosa) eating smaller lizard, Isla San Esteban, Gulf of California (Sea of Cortez), Baja California, Mexico, North America

Galapagos marine iguana (Amblyrhynchus cristatus), Fernandina Island, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Lava lizard (Microlophus spp,) on top of marine iguana (Amblyrhynchus cristatus), Las Bachas, Santa Cruz Island, Galapagos Islands, Ecuador, South America

Lava lizard (Microlophus spp,) on top of marine iguana (Amblyrhynchus cristatus), Las Bachas, Santa Cruz Island, Galapagos Islands, Ecuador, South America

Galapagos marine iguana (Amblyrhynchus cristatus), Fernandina Island, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Australian eastern water dragon (Physignathus lesueurii) in Brisbane Botanical Gardens, Brisbane, Queensland, Australia, Pacific

Leatherback turtle (Dermochelys coriacea) eggs being collected for transfer to a safer hatchery location, Shell Beach, Guyana, South America

Leatherback turtle (Dermochelys coriacea) eggs being collected for transfer to a safer hatchery location, Shell Beach, Guyana, South America

Juvenile Peyrieras' pygmy chameleon (Brookesia peyrierasi), Nosy Mangabe, Maroantsera, Madagascar, Africa

Juvenile Peyrieras' pygmy chameleon (Brookesia peyrierasi), Nosy Mangabe, Maroantsera, Madagascar, Africa

An adult green anaconda (Eunectes murinus), Maranon River, Amazon Basin, Loreto, Peru, South America

Green sea turtles (Chelonia mydas) common around Pom Pom Island, an important nesting grounds for these marine turtles, Celebes Sea, Sabah, Malaysia, Southeast Asia, Asia

A female green sea turtle (Chelonia mydas), and schooling bigeye jacks (Caranx sexfasciatus), Malaysia, Southeast Asia, Asia

Several green sea turtles (Chelonia mydas) gather at a cleaning station off West Maui, Hawaii, United States of America, Pacific, North America

Green sea turtles (Chelonia mydas), gather at a cleaning station off West Maui, Hawaii, United States of America, Pacific, North America

A green sea turtle (Chelonia mydas) makes its way to the surface off Maui, Hawaii, United States of America, Pacific, North America

Close-up head on view of a hawksbill sea turtle (Eretmochelys imbricata), Bunaken National Park, Sulawesi, Indonesia, Southeast Asia, Asia

Close-up view of a Hawksbill sea turtle next to a red sea fan on a reef in Raja Ampat, West Papua, Indonesia, Southeast Asia, Asia

Close-up view of the underside of a Hawksbill sea turtle, complete with barnacles, on a reef in Raja Ampat, West Papua, Indonesia, Southeast Asia, Asia

Green sea turtles (Chelonia mydas), pulled out of the water onto Ho'okipa Beach on Maui, Hawaii, United States of America, Pacific, North America

Marine Iguana feeding at Sea, Amblyrhynchus cristatus, Cabo Douglas, Fernandina Island, Galapagos, Ecuador

Green sea turtles (Chelonia mydas), an endangered species, Hawaii, United States of America, Pacific, North America

Saltwater crocodile at Yellow Water Wetlands and Billabong, Kakadu National Park, UNESCO World Heritage Site, Northern Territory, Australia, Pacific

Adult northern caiman lizard (Dracaena guianensis), swimming the Rio Yanayacu, Amazon Basin, Loreto, Peru, South America

San Esteban spiny-tailed iguana (Ctenosaura conspicuosa) on cardon cactus, Isla San Esteban, Gulf of California (Sea of Cortez), Baja California, Mexico, North America

Leatherback turtle (Dermochelys coriacea) laying eggs under the watchful eyes of a conservation worker, Shell Beach, Guyana, South America

Researchers measuring a female Leatherback turtle (Dermochelys coriacea) at its nest site, Shell Beach, Guyana, South America

Large Black Ctenosaur or Iguana Negra eating red Hibiscus flower near Nosara, Nicoya Peninsula, Guanacaste Province, Costa Rica

Galapagos marine iguana (Amblyrhynchus cristatus), Fernandina Island, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Green sea turtles (Chelonia mydas) common at Pom Pom Island, Celebes Sea, Sabah, Malaysia, Southeast Asia, Asia

Sonoran Desert Sidewinder (Sonoran Sidewinder) (Crotalus cerastes cercobombus) in captivity, Arizona Sonora Desert Museum, Tucson, Arizona, United States of America, North America

Galapagos marine iguana (Amblyrhynchus cristatus), Las Bachas, Santa Cruz Island, Galapagos Islands, Ecuador, South America

San Esteban spiny-tailed iguana (Ctenosaura conspicuosa), Isla San Esteban, Gulf of California (Sea of Cortez), Baja California, Mexico, North America

Applying a tag to a Leatherback turtle (Dermochelys coriacea) at its nesting site, Shell Beach, Guyana, South America

Turtle warden with nesting Leatherback turtle (Dermochelys coriacea), Shell Beach, Guyana, South America

Marine iguana (Amblyrhynchus cristatus), Suarez Point, Isla Espanola (Hood Island), Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Spectacled caiman (Caiman crocodilus) (Common caiman) (White caiman), Amazon Rainforest, Coca, Ecuador, South America

Australian eastern water dragon (Physignathus lesueurii) in Brisbane Botanical Gardens, Queensland, Australia, Pacific