Abstract
Many insights into the neurobiology of motor control have emerged through the study of vocal behavior in birds. Additional, complementary research programs in this system have focused on mechanisms of vocal development, production, perception, and function. A ‘developmental stress’ hypothesis posits that vocal features provide reliable indicators of male neural developmental history and that females use vocal parameters to assess male quality. Peripheral mechanisms of vocal production, including respiratory and vocal tract motor systems, can constrain the types of vocalizations birds produce, develop, and evolve. Experimental studies of song function have helped specify the role of vocalizations in species recognition and sexual selection. ‘Interactive’ playback methods are helping researchers understand how birds modulate the aggressive intent of their vocal signals.
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