ask Bernd Heinrich, who has tried to conceal his identity from the ravens he works with by changing clothing; wearing kimonos, wigs, and sunglasses; and hopping or limping to shift his gait. (The birds weren’t fooled.) Or John Marzluff, who describes walking across the campus of the University of Washington and being singled out from thousands of other people by American crows that recognize him as a dangerous person who has trapped and banded them. The disgruntled crows still remember him years later and harass
