1. Sea Turtles Part 2

2. Loggerhead Turtle Loggerheads can grow up to 350 lbs, between 31-42 ins. They can be identified by their large head, reddish brown carapace (top), and dull brown plastron (bottom).

4. Hawksbill Turtle The beautiful shell of Hawksbill turtles is often used for jewelry

6. Olive Ridley This is one of the smallest sea turtles, weighing only 100lbs. It is also one of the most numerous species of sea turtle. It is named Olive Ridley because of the olive coloring.

8. Kemp’s Ridley Kemp’s Ridley is the most endangered species, as well as the smallest: only grows to 24-28 ins and 77- 100lbs. They are olive green in color. They only nest on one beach in the world, in Rancho Nuevo, Mexico.

10. Leatherback Can dive the deepest and travel the furthest of any other turtle. They have tough leathery skin covering their back.

11. Leatherbacks Largest sea turtle, up to 7 ft long, 1200lbs. Instead of a solid shell they have bones in their skin that form 5 ridges.

12. Navigation

13. Navigation is finding the way from one location to another. What are some ways that people can navigate?

14. Navigation 1. Compass 2. Stars 3. Position of Moon and Sun 4. Maps 5. Landmarks What are some ways that sea turtles may navigate in the water and on land?

15. Navigation Sight Position of the moon Wave direction Internal compass (turtles that we know use this: loggerhead and leatherback)

16. Navigation So how do you think baby turtles navigate from the nest to the ocean?

17. Navigation 1. Move away from silhouettes at the top of the beach 2. Orient themselves toward the brightest light (moon on water in low populated beaches) They can sense the direction of waves when in the water Some use a magnetic compass.

18. Navigation What are some reasons a turtle might have to navigate in the ocean? How far do you think turtles may migrate?

19. Navigation They migrate to find: food mates and beaches to nest on

20. Navigation Some turtles migrate over 2600 km but most will only travel 1000 km.