Bats adjust their 'field-of-view': Use of biosonar is more advanced than thought

A new study reveals that the way bats use biosonar to "see" their surroundings is significantly more advanced than first thought. The study examines Egyptian fruit bats, whose high-frequency clicks form a sonar beam that spreads across a fan-shaped area; the returning echoes allowing them to locate objects in that region. As these bats were considered to have little control over their vocalizations, scientists had puzzled over how they're able to navigate through complex environments.

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