Scientists Say the Gibbon's Song Is One of the Most Complex Vocal Performances in the Animal Kingdom. Here's Why.
At dawn, in the rainforests of Thailand, Malaysia, and Indonesia, before the heat of the day has settled and while the mist still hangs between the trees, the forest fills with sound. It begins with a single voice — a series of rising notes, pure and clear, carrying through the canopy for up to two kilometres. Then a second voice joins — higher, more elaborate, weaving around the first in a…

















