This video from the USA says about itself:
How do you tell an Ivory-Billed Woodpecker from a Pileated Woodpecker? There are several distinct differences as this video shows. The Ivory-Billed Woodpecker was thought to be extinct, but may have been re-discovered as discussed in the video.
The Ivory-Billed Woodpecker is the one on the right and the Pileated is the one on the left. (This Ivory-Billed Woodpecker specimen was taken in Florida.)
From Wildlife Extra:
New sightings claimed for Ivory-Billed woodpecker
Ivory Billed woodpecker photos and recordings claimed from Louisiana
April 2011. Dr. Michael Collins, Naval Research Laboratory scientist and bird watcher, has published an article titled “Putative audio recordings of the Ivory-billed Woodpecker (Campephilus principalis)” which appears in the March issue of the Journal of the Acoustical Society of America.
The ivory-billed woodpecker, a striking bird that once flourished in the forests of the Southeast but was thought to have become esxtinct, has reportedly been sighted in eastern Arkansas, a Cornell University researcher says in a paper released Thursday: here.