The 39 species of birds-of-paradise look very different from each other, and they also also sound very different from each other. But researchers are only beginning to investigate their calls in detail. The sounds they make run the gamut from basic squawks, to seemingly mechanical noises, to melodious whistles, to sounds that don’t involve their voices at all. Filmed and photographed by Tim Laman. Explore more at www.birdsofparadiseproject.org

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