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Is it a boy or a girl?

WILDECHOES, a project that helps to understand birdsong, recently published a super interesting and very well illustrated article on the calls of the Common Swift (Apus apus).

Chris Hails compares his own recordings with the results of some scientific papers and through the analysis of the sonograms shows us how it is possible to distinguish the calls of males from those of females. He also gives us clues as to how different individuals can identify with each other, such as couples that get together year after year during the breeding season!

These subtle differences are imperceptible to the ears of most of us, but the flocks of swifts screaming on late summer afternoons do not go unnoticed! Now, even though we can't detect every detail of their call, we can understand them better!

Find out more here.

Good readings!


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