Interspecific song learning in a wild Chestnut-sided Warbler.

Vocal learning involving imitation is the prevalent mode of song development in songbirds. The evidence for vocal learning both from experimental studies and from local song variants shared among neighbors (dialects) indicates that songbirds generally learn from their own species, and that a genetically determined signal recognition center

ROBERT B. PAYNE et al, Wilson Bull., 96(2), 1984, pp. 292-294