April 3, 2006—After 50 years of "extinction," the ivory- billed woodpecker was spotted in an Arkansas swamp, researchers announced in April 2005. The discovery was likened to finding Elvis Presley alive and well, and the bird-watching world has been all shook up ever since.

Watch as an expedition paddles out in search of further evidence, and uncover the strange history of the elusive ivory-bill.