What is the purpose of gnats?

Related questions

1. What is the point of silent letters?
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4. What do gnats symbolize?
5. What causes gnats in the house?
6. Why there are silent words in English?
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Tags

1. #suborder
2. #mosquitoes
3. #includes
4. #midges
5. #insects
6. #pollinate
7. #flowers
8. #purpose
9. #serve
10. #craneflies
11. #which
12. #larger
13. #important
14. #gnats
15. #nature
16. #flies
17. #small
18. #birds
19. #nematocera
20. #whether
21. #source