Main Nesting Islands
(i) Pulau Selingaan
Selingan’s Resort The second largest of the three islands is Pulau Selingaan, which is nearly 8.0 hectares in extent. Coconut palms are found on the island with lantanas growing under them. The main laying beach is on the east of the islands as well as the south western side which is near the light-house. Most of the northern shore is rocky. Drinking water is collected from the rain water which is stored in storage tanks in each of the cabin.

(ii) Pulau Bakkungaan Kechil
Pulau Pulau Bakkungaan Kechil Bakkungaan Kechil is the largest of the three islands and lies nearest to the Philippines border. This 8.5 hectare-island has a wide promontory to the south east. Unlike the other two islands there is a slight hill in the centre of the island where mud volcanoes are still active and bubbling mixture of mud and water ooze out from the centre of the earth. The island is covered under coconut and lalang grass. The northern and western sides of the island are the favorite nesting beaches of the green turtles.

(iii) Pulau Gulisaan
Pulau Pulau Gulisaan Gulisaan is the smallest islands covering only about 1.6 hectares in extent. Coconut palms grow on the high beach and a short tough grass has established itself on the island. Turtles favour the northern and eastern beaches and some nest on the south western beach.

Nesting Seasons
Green Turtle Unlike in other parts of the world, the Green Turtle (Chelonia mydas) and the Hawksbill Turtle (Eremochelys imbricata) come ashore to lay their eggs throughout the year in varying numbers on the Turtle Islands Park. The best eggs laying months are during July to October in each year.

Nesting Time
Under normal circumstances, the gravid turtles land on the beaches of the three islands after 7.30 p.m. or much later. They have also been observed to nest between the hours of 5.00 a.m. and 6.00 a.m. occasionally.

Nesting Behaviours
The complex and tedious nesting process of the turtle can be divided into eight stages: Nesting site above tide mark.

1. Emerging from the sea, selecting a course to a beach.
2. Selecting a nesting site above the high tide mark.
3. Clearing the site with sweeping motions of the front and sometimes hind flippers to encave herself in the body pit.
4. Excavating the eggs chamber with her rear flippers to a depth about 12 to 18 inches.
5. After the completion of the eggs pit, there is a short rest, then she proceeds to lay her eggs.
6. When all the eggs have been laid, the process of filling, covering and packing the nest cavity with sand takes place.
7. Then the filling of the body pit and concealing of the nest is so well done that it is extremely difficult for predators to locate it later.
8. After completing the lengthy process of covering and concealing the nest pit, the turtle returns to the sea. The whole process normally takes about an hour to complete.