PALOUSE, Wash. -- Pity the poor robin that latches onto one of these worms. A yard long and as big around as a man's pinkie finger, the giant Palouse earthworm is albino-pale, can burrow 15 feet deep and smells like a lily. The recent discovery of one of the scarce giants has energized entomologists and soil scientists, who fear it may be near extinction. "It was very exciting. Just to find something we thought, perhaps, was gone is a great thing," University of Idaho soils scientist Jodi Johnson-Maynard said. The native giant earthworms have been found by scientists only four...