John Burroughs praises Audubon’s life’s work, yet questions some of Audubon’s assertions about comparisons between the Louisiana Waterthrush’s song and the European Nightingale’s, the Bobolink’s and the Blue Grosbeak’s. Burroughs appreciates the volume of Audubon’s catalog, and offers two of his own to add to the collection. Click the links below for details about the…