Why is Twitter's logo a bird?

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Tags

1. #twitter
2. #bowman
3. #based
4. #circles
5. #overlapping
6. #larry
7. #bluebird
8. #intricate
9. #named
10. #slightly
11. #douglas
12. #boston
13. #after
14. #mountain
15. #celtics
16. #another
17. #three
18. #wings
19. #revealed
20. #background
21. #plumage
22. #designer