These Odd Birds Flirt by Clapping in the Middle of the Night
SMRTR summary
Male scissor-tailed nightjars in South America make a snapping sound during mating rituals by literally clapping their wrist bones together mid-flight. Researchers using high-speed infrared cameras in Argentina caught the birds arcing their wings overhead and cracking them together, even high-fiving each other after mating. Interestingly, the birds show no special bone adaptations to produce this sound, much like humans clapping.
SMRTR provides this summary for quick context. The original article belongs to Nautilus.
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