1. plural of pipistrelle; small insectivorous bats of the genus Pipistrellus, found in Europe, Asia, and Africa, characterized by rapid flight and high-frequency echolocation calls.
Usage: zoology; plural form

Examples

• The pipistrels emerged from their roost at dusk to hunt for insects.
• Researchers tracked the pipistrels using ultrasonic detectors to study their migration patterns.
• Several pipistrels nested in the old barn throughout the summer.
• The pipistrels' echolocation calls are too high-pitched for human ears to detect.
• Conservation efforts have helped protect pipistrels in their natural habitats.