Technique for visual threshold measurement in vampire bats

Scholocating bats have considerable visual capabilities. The relatively large visual portion of the brain in vampire bats implies better visual ability than in insectivorous Michrochisoptera. Knowledge concerning the visual, olfactory, and sound thresholds of this species could prove useful in determining their methods of prey detection. This report presents visual threshold data for two Desmodae using the outlined procedure. The study indicates that vampire bat and human rod visual sensitivity are quite similar.