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Mean (sd) vocal production for birds in each condition
| Prior to conditioning | During conditioning | ||
|---|---|---|---|
| Zebra finch | undirected song | 6.77 (8.4) | 6.59 (13.30) |
| directed song | 5.5 (7.04) | n/a | |
| calls | 9.14 (8.42) | 46.27 (39.87) | |
|
| |||
| Starling | |||
| fall condition | undirected song | 3 (2.66) | 0 |
| calls | 5.36 (4.93) | 5.78 (9.40) | |
|
| |||
| spring condition | directed song | 2.58 (4.76) | 8.75 (4.07) |
| calls | 6.33 (8.77) | 7.00 (11.15) | |
