Abstract

We presented captive male wood thrushes with recordings of natural and synthesized songs of varying similarity to their own songs. Having repertoires of several different song types, the birds could answer with either a song of the same type (i.e. match) or a different type. The results indicate that matching is a graded function of song dissimilarity: the more similar the stimulus song is to the bird's own song of the same type, the less it is matched.

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