Do birds have a second eyelid?

Related questions

1. Do you blink or breathe more?
2. Do your eyelids have muscles?
3. What is the function of third eyelid in human beings?
4. What part of the brain controls eyelids?
5. Can nerve palsy be cured?
6. Do humans have 3 eyelids?
7. Which among the following is vestigial organs in man?
8. How is trigeminal neuralgia diagnosed?
9. How do you test optic nerve?
10. How do eyelids help the eyeballs?

Tags

1. #alliterative
2. #nictitating
3. #protecting
4. #means
5. #called
6. #structure
7. #evolved
8. #extra
9. #blinking
10. #humans
11. #outer
12. #fortunately
13. #simply
14. #birds
15. #membrane
16. #their
17. #upper
18. #beneath
19. #syllables
20. #eyelids
21. #lower
22. #eyelid