Male Ivory-bill at entrance of nest. Photo taken in Singer Tract, Louisiana by Arthur A. Allen (April 1935). From Recent observations of the Ivory-billed Woodpecker (Auk) Volume 54, Number 2, April, 1937.
Arthur A. Allen
<a rel="nofollow" class="external free" href="https://sora.unm.edu/node/17347">https://sora.unm.edu/node/17347</a>