Question

The Rock Stars of Madagascar
News: Animals in Action

An indri with bright yellow eyes gazes into the camera.
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Video credit: Giovanna Bonadonna


Does this recording of indris singing sound like music to you? Why or why not?

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Answer 1

Yes — to many listeners the indris’ singing does sound like music. Their calls have clear pitch contours (melodies that rise and fall), repeated motifs, coordinated timing between individuals (duets and choruses), and timbral contrasts that create harmony-like overlaps. Those features — repetition, pattern, pitched tones and coordinated rhythm — are the same acoustic ingredients humans use to make music, so our brains tend to register the calls as musical.

However, it’s also important to note why it isn’t human music: the indris’ songs evolved as communication (territory marking, group cohesion, mate attraction) rather than for aesthetic expression. Their “rhythms” aren’t metrically regular like many human songs, and the organization follows biological and social functions rather than cultural rules. So while it can sound musical, it is best understood as a biologically driven, highly structured vocal display rather than music in the cultural sense.