Why do biologists news special equipment to detect the noises bats make?

Biologists use special equipment to detect the noises bats make because these sounds, often ultrasonic, are beyond the range of human hearing. This equipment, such as bat detectors, allows researchers to analyze bat echolocation calls, which are crucial for understanding their behavior, communication, and hunting strategies. By capturing and interpreting these sounds, scientists can gain insights into bat populations, their habitats, and their roles in ecosystems.