We start with a typical farmland scene, familiar to everyone: a bunch of birds following some farm equipment being dragged across a field. Sometimes, the followers will be gulls, but in this case they are black and long winged and look like classic corvids. There are three common black crows that could conceivably follow such a machine: Carrion Crow, Rook and Jackdaw (Ravens are very unlikely to be seen in such a flock). Luckily, they are pretty easy to identify, even when small in a photo such as this. Firstly, Jackdaws have grey heads and small peg-like black bills. Carrion Crows and Rooks are similar in size and shape, but Carrion Crows have black bills, with blackfeathered bases. These birds have pale-based bills. They are Rooks.
KEY FEATURES Black crows following some kind of tilling machine Long wings with ‘fingered’ tips Long, round-ended tail Pale bill base diagnostic
Clearly, black crows Pale grey bill base/face Rounded tail