Imagine away the accumulated knowledge of the past 250 years. Forget that there is such a thing as a field guide. Let google vanish from memory.
And put yourself into the forest primeval of southeastern North America on a warm summer night in the middle of the eighteenth century. Above the rasping of the cicadas and the creaking of the tree crickets, beyond the yowls and hoots and delicate whistles of the owls, you hear the strange syncopated whistles of what has to be a bird.
But which one?