Turtle nests are flask shaped; narrow and elongated at the top and wider and more rounded at the bottom. The depth of a nest depends upon the species, with larger turtles like the Leatherback constructing nests between 80cm-over 1m deep. Smaller species such as the Olive Ridley construct shallower nests to a depth of approximately 30cm. A turtle will dig down into the sand until she can reach no deeper. The nest of a Leatherback differs from that of other turtles in that instead of being rounded at the bottom, it is almost rectangular in shape.