AI Insight
Scissor-tailed nightjars (Hydropsalis torquata) in northern Argentina produce a distinctive clapping sound during courtship by snapping their wings together at the wrist joint, a behavior that has been documented in detail for the first time. Researchers captured and analyzed this mechanical sound production, adding it to the broader category of non-vocal avian communication known as sonation. The findings suggest that wing-clapping serves as a courtship signal in this species, functioning similarly to song or visual displays in other birds.
Why it matters
Understanding non-vocal acoustic communication in birds expands knowledge of how animals convey information and attract mates through alternative sensory channels, which may have implications for bioacoustics research and conservation monitoring of cryptic nocturnal species.
Some birds sing to attract a mate. Others dance or display colorful feathers. But in the moonlit forests and shrublands of northern Argentina, one bird courts romance by snapping its wrists together, producing a sharp clapping sound scientists have puzzled over for decades. Now, researchers have captured the behavior in detail for the first time, revealing how scissor-tailed nightjars create one of the most curious sounds in the avian world.
Source: Birds clap in the dark to flirt: Nightjars reveal a hidden language of sound