The Ivory-billed Woodpecker, (Campephilus principalis), is a very large and extremely rare or extinct member of the woodpecker family, Picidae. It is officially listed as an endangered species, and until recently had widely been considered extinct. However one male bird has been reportedly sighted in Arkansas in 2004 and 2005.
If its rediscovery is confirmed, this would make the Ivory-billed
Woodpecker a lazarus species, a species that is rediscovered alive after being considered extinct for some time. However, despite the highly
publicized announcement of its rediscovery, skepticism about the reported sightings has been growing, with a number of prominent experts questioning the evidence.
In June 2006, a $10,000 reward was offered for information leading to
the discovery of an Ivory-billed Woodpecker nest, roost or feeding site.