Birders excited about woodpecker sightings Tuesday, September 26, 2006 By BILL FINCH Environment Editor Auburn University researchers published evidence today of what some are describing as an ivory-bill woodpecker "Shangri-La" in the Florida Panhandle, a couple of hours east of Mobile. Researchers said they've had 13 sightings of the ivory bill, long thought to be extinct, and have recorded some 300 distinctive calls and sounds associated with the giant woodpecker, the largest in the United States and a virtual Holy Grail for many birders. The last clear photographs of the bird -- and uncontested proof of its existence -- date...