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This undated letter from William Brewster (1851–1919)—a renowned American amateur ornithologist, first president of the Massachusetts Audubon Society, and a president of the American Ornithologists' Union—to the editor of The American Naturalist records his observations of a spotted sandpiper diving into a pond to escape a hawk.

This undated letter from William Brewster (1851–1919)—a renowned American amateur ornithologist, first president of the Massachusetts Audubon Society, and a president of the American Ornithologists’ Union—to the editor of The American Naturalist records his observations of a spotted sandpiper diving into a pond to escape a hawk.