Dr. Marzluff believes that this ability gives crows and their brethren an evolutionary edge. “If you can learn who to avoid and who to seek out, that’s a lot easier than continually getting hurt,” Dr. Marzluff said. “I think it allows these animals to survive with us — and take advantage of us — in a much safer, more effective way.”
If you missed Nature last night, it was all about crows' intellegence and humans' increased interest in studing them. You can watch PBS's Nature: A Murder of Crows below.