It is no coincidence that we rarely find an American crow living alone. This reason for this is American crows are social animals.
American crows live typically live together in small groups consisting of a breeding pair and their offspring.
My wife and I feed crows. This enables us to watch their behavior. One thing we have learned that the family of crows that visits our home consists of a male and female and their three young. As such, when the crows arrive, we always see five birds.
My daughter also feeds crows. Until recently, like clockwork four crows show up every day to dine on her food offerings. One of the birds has a damaged wing. Apparently, something happened to that bird, as it has not appeared to dine with its family during the past few weeks.