Undated photo of a Swainson's thrush. Like disoriented hikers, migrating songbirds went the wrong way when their inner compasses were disrupted. But the birds recovered, apparently using sunset clues to reorient themselves. How migrating birds find their way over great distances has long intrigued people. Some birds can orient themselves with an internal compass using the earth's magnetic field. Others seem to follow the sun, the stars, polarized light or different clues. (AP Photo/Laura H. Spinney, Science Magazine) ORG XMIT: WX110
Section:Photo