| 21. | The opening track " Bird Song " was written by Lovich and Les Chappell.
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| 22. | Several more bird songs are found in the fourth movement.
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| 23. | In the pauses between, bird song twitters from the thick greenery along the road.
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| 24. | Bird song went off in the background like weekend fireworks.
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| 25. | A sound trainer can play multiple bird song recordings simultaneously.
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| 26. | Q . Bird song patterns are quirky and cute, but what do they mean?
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| 27. | Every 15 minutes it sang a line in a very beautiful realistic bird song.
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| 28. | Eurovision Bird Song Contest : http : / / www . birdeurovision . org
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| 29. | Moldenhauer and his students seek to discover whether bird song is learned or innate.
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| 30. | Male house mice court females by emitting characteristic bird songs because of their complexity.
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