 Also noted in the lower level of the Rano Raraku crater are tall bulrushes and "Scirpus tautara" that were probably introduced by seafarers from South America.The island's only mammals are rodents and carnivorans.The reptiles recorded are three species of marine turtles and two terrestrial lizards, "Lepidodactylus lugubris" and "Ablepharus boutoui poecilopleurus".