Even to the north, in their stronghold, Ravens are more common than they were 25 years ago, so perhaps their expansion into our area shouldn't be a total shock. Over the next few weeks, particularly on calm sunny days, watch for the Brighton ravens north of town. This is the time of year that courtship displays and flights are going on in earnest, and they should be out and flying around on nice days. They can also make noises that sound like the chime of a bell, plus all sorts of other odd sounds. The bill of a Raven is proportionally much heavier than a crow, and they also have elongated feathers on the throat which they puff up in display or when calling.
Ravens are among the most intelligent members of the animal kingdom.