Adder (Vipera berus) in closeup, before shedding skin, Northumberland National Park, England, United Kingdom, Europe

Galapagos Land Iguana (Conolophus subcristatus), large lizard can can grow to five feet long and live for 60 years, South Plaza island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Galapagos Land Iguana (Conolophus subcristatus), large lizard can can grow to five feet long and live for 60 years, South Plaza island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

An adult border anole (Anolis limifrons) shedding its skin in a tree at Playa Blanca, Costa Rica, Central America

An adult border anole (Anolis limifrons) shedding its skin in a tree at Playa Blanca, Costa Rica, Central America

A sagebrush lizard, Sceloporus graciosu basking on a granite rock in Yosemite, California, USA.

A Slow worm, a legless lizard

A Lace Monitor Lizard (Varanus varius) in Australia.

The endemic marine iguana (Amblyrhynchus cristatus) in the Galapagos Island Group, Ecuador

Hawksbill turtle (Eretmochelys imbricata) - adult female returning to sea after laying eggs in the sand. Bird Island, Seychelles, Indian Ocean. (RR)

Green Turtle (Chelonia mydas), detail of head, Cayman Islands, Caribbean.

Hawksbill sea turtle (Eretmochelys imbricata).

Close up of rough alligator skin

Chameleon skin, Panther Chameleon (Furcifer pardalis), Ambilobe region, Ambilobe-Ambilorama colour variation, Madagascar, Africa, Indian Ocean

Close-up of the details of the colourful head of an iguana, Corozal Bay, Belize

Close-up of Nile crocodile foot (Crocodylus niloticus) in sunshine in Chobe National Park, Botswana

Close-up of Nile crocodile head (Crocodylus niloticus) on riverbank in Chobe National Park, Botswana

Submerged alligator (Alligator mississippiensis) is only visible with his armored back poking above placid waters as he hunts on the muddy bottom of the Okefenokee Swamp. The reptiles skin has embedded bony plates called osteoderms or scutes. Alligator populations are considered to have recovered from overharvesting pressures through supplemental farming practices and protections placed on wild animals. However, the species is still federally listed as threatened because it looks like the American crocodile, which is endangered, Georgia, United States of America

Aldabra giant tortoise (Aldabrachelys gigantea) crosses lawn near trees, Segera, Laikipia, Kenya

Alligator Eye (Alligator Mississippiensis), Gainesville, Florida, United States Of America

Giant tortoise (Chelonoidis nigra) are the largest living species of tortoise that can grow up to 880 pounds and reach more than 6 feet in length, Santa Cruz Island, Galapagos Islands, Ecuador

This Green sea turtle (Chelonia mydas), an endangered species, is rubbing it's chin on it's shoulder, Hawaii, United States of America

A close look into the eyes of a Green sea turtle (Chelonia mydas), an endangered species, Philippines

Chinese crocodile lizard

Portrait of Nile Crocodile on the bank, Chobe Botswana]

Nile Crocodile skin, Chobe Botswana

American crocodile;Crocodylus acutus) in water, Tarcoles, Costa Rica.