1. Natural Events-Desert describes a female turtle's spawning process in namib desert, Africa for several years, and her hard work to protect her eggs.

2. Planet Turtle, a documentary about the green turtle, the largest land animal in the world. The film describes the living habits, mating, hatching and growth process of young turtles in detail.

3. Turtle Island records the ecosystem of California coast and the life of local creatures, paying special attention to the life and protection of turtles.

4. The Polar Region, a natural event, describes the changes in Antarctica throughout the year, especially the migration and reproduction process of penguins, turtles and other animals.

5. The documentary "Ocean" about marine ecology and marine life produced by 5.BBC. Although it is not a documentary about turtles, it also involves the life and protection of turtles and other marine reptiles.

I hope these documentaries can provide you with more knowledge and understanding about turtles.