As you walk along the trail on Rábida Island, your peripheral vison will detect something small scurrying by your feet. This five to six inch critter will either disappear in seconds or raise its scaly head in curiosity. Say hello to a Galápagos lava lizard. This is one of seven species of lava lizards endemic to the Galápagos. Although they are located on most of the islands, their coloring is unique to each. You might also spot a colony of black marine iguanas sunning on rocks along the shore. They are the only iguana in the world that lives and nests on land yet feeds in the sea.