American Crows all look more or less identical to the human eye. But Annie and Jack came to recognize Sal, a bold character with a distinctive hop due to a bad leg, and began offering the bird unsalted peanuts. The treats attracted a second, more timid crow, whose deformed foot also distinguished it. They called Sal’s buddy Pal. Within a few weeks, Annie and Jack were buying peanuts in bulk. Using food as a reward, they trained the two corvids to pay them regular visits.