Biologist Vittorio Baglione has spent his career obsessing over a bird that doesn’t want him around. “They don’t like you,” he says of the carrion crow, a cautious creature considered one of western Europe’s cleverest birds. “They don’t like your company.”For the past 30 years, Baglione has pursued them anyway. As a young researcher, he studied the way carrion crows reared their chicks and patrolled their territory for threats. More recently, in 2018, he began trying to understand what they were...