As the summer of 1821 began, John James Audubon's ambition to create a comprehensive pictorial record of American birds was still largely a dream. Then, out of economic necessity, Audubon came to Oakley Plantation, a sprawling estate in Louisiana's West Feliciana Parish. Teeming with an abundance of birds, the woods of Oakley galvanized Audubon's sense of possibility for one of the most audacious undertakings in the annals of art. In A Summer of Birds,...