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How do crows develop such distinct and individual “voices”? I don’t hear this with other bird species in my garden.

Nicola Clayton and Francesca Cornero, University of Cambridge, and Valerie Dufour and Killian Martin, French National Centre for Scientific Research

When you hear crows and other members of the corvid family, such as rooks, ravens, jays and magpies, you may notice that each bird has its own individually distinct voice. This is the case for many songbirds, but we find it easier to hear in crows because of how human hearing works.

We are better at detecting differences between low-pitched…