Birding, the gentle pastime of watching birds, can at times become a competitive sport. Even at its worst, though, when birders don't give out information of their sightings and try to sidetrack other birders, it seldom rises to the level of serious harm . . . usually. But when Bob White mannered school councilor and dedicated weekend birder, finds a body on a birding trip, the idea that there's an exception to every rule gets hammered home.