So to do this, I would go out into some unsuspecting Seattle neighborhood and I would start to feed a breeding pair of crows over the course of three days, and this provided a baseline for how quickly the crows would come down to a food pile, which, as you'll see in a minute, was really important.
Para hacer esto, iría a un vecindario cualquiera de Seattle y daría de comer a una pareja de cuervos durante tres días. Esto nos dio un punto de referencia para lo rápido que los cuervos acudían por la comida, algo que, como pronto verán, era muy importante.