What acoustic behavior lets singing mice produce rapid, high-pitched calls during social interactions?

Singing mice use ultrasonic vocalization to produce rapid, high-pitched calls during social interactions.

Several mouse species, especially singing mice studied in Central America, produce complex sequences of ultrasonic sounds. These vocalizations can occur during courtship, territorial encounters, and other social situations. Their frequencies are generally above the range of normal human hearing, so people may perceive the animals as silent without specialized equipment.

Laboratory mice also produce ultrasonic calls, including distinct patterns associated with pups, adults, courtship, and social excitement. Researchers analyze the calls by frequency, duration, repetition, and sequence. “Ultrasonic” describes the frequency range, not one single message or sound type.

This communication should not be confused with echolocation, which uses echoes for sensing the environment. Mice use ultrasonic vocalizations mainly for communication, whereas bats use echolocation primarily to detect objects and prey.