A native, yellow land iguana rests on a rock in the shadow of a tree on North Seymour Island, near Santa Cruz in the Galápagos Islands

land iguana iguana conolophus subcristatus galapagos galapagos islands reptile seymour island north seymour north seymour island santa cruz santa cruz island bbc herbivores sand iguanas lizard archipelago galapagos archipelago spine lizards reptilian scales sandy charles darwin dragon endemic species conservation science iconic charismatic waddle reptiles islands native wild evolution biodiversity wildlife dragons bask hot dry arid rock yellow orange shade