Keywords: Campephilus principalisAO5F392GA1.jpg Ivory-billed Woodpecker Campephilus principalis detail of head bill; reproduction of watercolor Key to North American Birds 1903 5th edition creator Louis Agassiz Fuertes public domain--published in the United States pre-1923 also reproduction of art-work where artist died more than 70 years ago PD-Old PD-old-auto 1927 Campephilus principalis heads Campephilus principalis anatomy Piciformes beaks Key to North American Birds Coues PD art uploaded by Patrick Coin |