"A team of researchers led by Theodore Simons, a biologist at N.C. State, found that trained bird-watchers aren't as good at hearing birds in the wild as previously thought, and their powers of perception drop sharply with even small increases in background noise. Factors such as traffic noise and observers' inaccurate spatial perceptions could inadvertently bias bird counts, they say."
Link: Full article from The News & Observer
American Redstart © 2008 Mike McDowell
