one of the crow family, that includes rooks, carrion crows, ravens and jackdaws,  that lives in the woods along the Tamar. It looks like a crow or a raven but in the bright morning sun appears to have a lot of grey on the underside of the wings and throat. The silhouette is typical of a raven, but both crows and ravens are meant to be a glossy black all over. Hooded crows have well defined grey markings but are confined to Scotland, Ireland and the Isle of Man. Maybe it is just a trick of the bright light.