What Makes Them Smart: Don't cross a crow; they are slick birds. Crows and jays know how to use tools, play games, and have been recorded pulling tricks on each other. The birds have a complex dialect that varies based on population.
Recent Discovery: Seriously, don't cross a crow. Scientists have come to believe that this bird can remember faces of people they find dangerous. Crows most likely remember these faces for their lifetimes, and may recruit family members to mob disliked individuals. (Discovery)