Is it a rook? Is it a raven? Or is it a crow? The three all-black birds from the corvid family often cause an ID challenge. But they and their cousins can be identified by their size, shape and…

Is it a rook, raven or crow? The three all-black corvids cause a common ID challenge but they can be identified by their size, shape and calls.

If you have ever driven along a motorway or country road, there is a good chance that you’ll have seen a formidable bird of prey swooping overhead, or maybe perching on a fencepost.