Sea turtles will sometimes end their nest building and return to the water for any of the following reasons:
a) obstruction of the digging by thick tree roots, rocks or logs which make digging difficult.
b) the sides of the nesting chamber collapsing because the sand is too dry to support the turtle's
c) interruption by other turtles, animals or humans.
d) fouling the pit by urinating in it.
Whatever the cause, a failure to nest is known as a "false crawl."