High functional complexity despite an extremely small repertoire of calls in the Spotted Crake (Porzana porzana)
Vocal learning and nonlearning birds frequently use the same habitats and are subject to similar selection pressures. However, although the repertoires of learning species are usually more complex, we know much less about how nonlearners encode information in acoustic signals. The present study describes the use of 3 basic mechanisms of acoustic encoding in signals of a vocal nonlearner: in repertoire, in acoustic structure, and in the temporal distribution of sounds. The study is based on...[Show more]
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