You know how can recognize someone that you know just by the sound of their voice?

Well, there is a jogging path near where I live that goes through some tall trees. Usually at dusk, lots of crows like to gather there and they’re extremely noisy with their cawing. This got me to wondering if they can tell their friends apart among all that noise.

A silly question, yes, but I am wondering if any ornithologists, bird lovers, or bird watchers out there might care to share what they know about this.