"The , that common small hawk, may also be known and instantly distinguished from the — which is more of a woodland bird — by it manner of hovering in the air. The sparrow-hawk glides along, dashes round bushes, sweeps over a hedge and disappears; but the kestrel mounts to a fair height, quivers its wings, spreads its tail like a fan and hangs poised in mid-arie for what seems to the watcher a considerable time. It is watching for s in the herbage below."