This continued into the 80s with the proposal of the Ojito del Agua Refuge, associated with the last sighting of the Royal Woodpecker, a last remnant of this species which was already extinct in its other habitats in the United States and Mexico.
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Early in his tenure, the Audubon Society, with an interest in the ivory-billed woodpecker, which faced extinction, persuaded Ellender to work for the establishment of the proposed Tensas Swamp National Park to preserve bird habitat: 60,000 acres of land owned by the Singer Sewing Company in Madison Parish in northeastern Louisiana.
Recently, Bayou De View and the town of Brinkley have gained international attention from possible sightings of the Ivory-billed Woodpecker, which was thought to be extinct since the 1940s.
Cuchillas del Toa is home to the highly endangered Cuban Ivory-billed Woodpecker (Campephilus principalis bairdii), Cuban Kite (Chondrohierax wilsoni), and the Cuban Solenodon (Solenodon cubanus).
Of the 28 forest bird species with habitat exclusively in that forest, Pimm claims four become extinct either wholly or mostly because of habitat loss, the passenger pigeon, Carolina parakeet, ivory-billed woodpecker, and Bachman's Warbler.
In 1932, Spencer, a sportsman armed with a hunting permit, shot a rare Ivory-billed Woodpecker along the Tensas River on a large tract of swamp forest land owned by the Singer Sewing Company.
Stiles and Skutch, A guide to the birds of Costa Rica, ISBN 0-8014-9600-4
As one of the first three searchers to report seeing and identifying the species, he played an instrumental role in the 2004/2005 Arkansas reports of the Ivory-billed Woodpecker.