As anyone who has tried to hold a conversation in a noisy room knows, it is sometimes easier to rely on hand gestures than to shout over the din. White-throated dippers face a similar challenge along the fast-flowing streams they inhabit, where the roar of fast-flowing waters can sometimes drown out their melodic songs. Rather than trying to out-sing the river to defend territory or attract mates, these plump, endearing birds sometimes switch strategy entirely—turning to sight instead of sound, by flashing their bright white eyelids in a striking visual display.
In the blink of an eye: Wild birds switch from sound to sight communication in noisy stream environments
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