- Migrating is an instinctive behavior
- Green sea turtles migrate to reproduce
- Hence, green sea turtles migrating to reproduce is an instinctive behavior

So, green sea turtles migrating to reproduce is an instinctive behavior
Every year, green sea turtles migrate approximately 2000 km to reproduce. This migration is an example of
- Migrating is an instinctive behavior 
- Green sea turtles migrate to reproduce