The only way to see the tail shape of the bird properly is to see the bird in flight. Since it flies by so fast, just look at the basic shape the silhouette of the tail creates. In many all-black crow species, this tail shape is triangular. But in ravens, the shape is usually more like a wedge.
Although individual birds vary, in general ravens are much shyer than crows. However, juvenile ravens have often been observed behaving as bold as crows while their elders admonish them from their hiding places.