Hatchlings use the light from the moon to find their way to the water. Street lights discourages them from nesting on the beach and cause confusion, putting them in danger to head inland.
Turtles deposit approximately 100 golf-ball size eggs, gently cover the eggs with sand and then they spread sand over a wide area to obscure the exact location of the chamber. They then leave the nest site and reenter the water.
Since adult sea turtles do not nurture their hatchlings, the female never sees the nest site again. A single female may nest several times during a season and then not nest again for one or two years. Approximately half of all emergencies result in a female crawling on the beach for long distances and reentering the water without digging a nest. These are called "false crawls" and usually occur because the turtle was disturbed or it could not find a suitable nest site. The crawl tracks left on the beach are always made by female sea turtles and they resemble marks left by a tractor tire. Male sea turtles never leave the ocean.
Incubation of the nests takes about 45-55 days. Here in Broward County the eggs that are deposited in the chambers are either left to incubate naturally or are moved, (relocated) to a safer area of the beach. Some of the nests are relocated because of the extent of the development on our beaches and the bright lights from condos, streets, and highway traffic. The relocation process serves to protect the emerging hatchlings so they can exit the nest and traverse the beach to the water on their own. Nests that are not moved are those that are already on safe beaches.
After incubation, the hatchlings emerge from the nest en masse and, using various environmental and inherited cues, quickly migrate to the water's edge. If artificial lights are lighting the beach, the hatchlings will be disoriented, travel in the wrong direction, and possibly never make it to the water.
Once in the water the hatchlings swim directly out to sea, facing a perilous struggle to survive to adulthood. The best scientific estimates available indicate that only one in 1,000 hatchlings will survive (anywhere from 12-50 years) to become a reproductive adult sea turtle.
DID YOU KNOW? Broward County had a record-breaking sea turtle nesting season in 2016 with a total of 3,567 nests laid overall, making it the highest year on record since the Broward County Sea Turtle Conservation Program (BCSTCP) began counting nests in 1981. (Edging just ahead of the previous record in 2012 when 3,540 nests were laid).