This study was supported in part by the National Science Foundation under Grant No. PHY94-15583.
Perception in animals, Birds -- Behavior
Studies head movement and vision in underwater-feeding birds. Review of relevant literature on the physiological and behavioral aspects of vision; Role of vertical head movement as an aid in the acquisition of visual information.
Casperson, L. W. (1999). Head Movement and Vision in Underwater-Feeding Birds of Stream, Lake, and Seashore. Bird Behavior, 13(1), 31.