Can Ducks recognize human faces?

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Tags

1. #research
2. #birds
3. #differentiate
4. #could
5. #friends
6. #their
7. #being
8. #summary
9. #faces
10. #suggests
11. #potential
12. #identify
13. #people
14. #recognize
15. #ability
16. #between
17. #voices
18. #survive
19. #human
20. #friend