Classic work by Edwin Teale, a Thoreau follower who became an icon in his own right who travels by auto from the Everglades to Canada shortly after World War II, with a stop at Concord to walk in Thoreau’s footsteps.

“One bird we heard singing beside the right-of-way that  morning was an individualist, like Thoreau. It sang a different song, a song of its own . . . It was a male Towhee . . . It is only the coarseness of our hearing, the wavering of our attention, the scantiness of our acquaintanceship that leads us to assume that all meadowlarks whistle alike or all bluebirds warble the same. . . Aretas A Saundes studied records of 884 song sparrows and found that no two sang exactly alike.”