Corvids outscore dogs and equal primates on a number of dimensions, with their tool use, and understanding that other creatures have minds (minds that can be deceived) capabilities. Also, Corvids engage in play, from repeatedly sliding down snowbanks, to using a piece of bark to surf the air via updrafts. They recognize individual humans, and have been know to gift humans with small tokens,
Initially, I really wanted a New Caledonian Crow for a pet (they seem to be the brightest of the lot). However, after reading the sections where the crows mob other individual birds, and mercilessly tease other animals, I changed my mind. The authors present a very balanced look at corvids, including the limitations of corvids as demonstrated by the research. Some of the sections on how corvid brains function, shed light on human brains (yes, these avian dinosaurs show convergent evolution with humans).