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Cover Picture: An echolocating bat photographed just milliseconds before intercepting a tethered insect in the laboratory. The bat computes the three-dimensional location of the insect from acoustic information contained in sonar echoes, and it uses this spatial information to guide prey-capture behavior. In the bat, changes in echolocation behavior are closely tied to target distance; thus, the feedback process that integrates sensory and motor signals driving acoustic orientation by sonar must include spatial information about a target's azimuth, elevation, and range. The article by Valentine and Moss in this issue (pp. 1720-1733) describes three-dimensional spatial selectivity of auditory neurons in the bat superior colliculus, a midbrain structure believed to play a role in sensorimotor integration for species-appropriate orienting behavior. (Photograph by Steven Dear.)
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