They presently flew out from the hedge, and alighted on one of the rows of cut barley, making it suddenly brown from one end to the other. There must have been thousands; they continually flew up, swept round with a whirring of wings, and settled, again darkening the spot they chose. Now, as the sparrow eats from morning to night without ceasing, say for about twelve hours, and picks up a grain of corn in the twinkling of an eye, it would be a moderate calculation to allow this vast flock two sacks a week. Among them there was one white sparrow--his white wings showed distinctly among the brown flock. In the most remote country I never observed so great a number of these birds at once; the loss to the farmers must be considerable. There were a few fine days at the end of the month. One afternoon there rose up a flock of rooks out of a large oak tree standing separate in the midst of an arable field which was then at last being ploughed. This oak is a favourite with the rooks of the neighbourhood, and they have been noticed to visit it more frequently than others. Up they went, perhaps a hundred of them, rooks and jackdaws together cawing and soaring round and round till they reached a great height. At that level, as if they had attained their ballroom, they swept round and round on outstretched wings, describing circles and ovals in the air. Caw-caw! jack-juck-juck! Thus dancing in slow measure, they enjoyed the sunshine, full from their feast of acorns. Often as one was sailing on another approached and interfered with his course when they wheeled about each other. Soon one dived. Holding his wings at full stretch and rigid, he dived headlong, rotating as he fell, till his beak appeared as if it would be driven into the ground by the violence of the descent. But within twenty feet of the earth he recovered himself and rose again. Most of these dives, for they all seemed to dive in turn, were made over the favourite oak, and they did not rise till they had gone down to its branches. Many appeared about to throw themselves against the boughs. Whether they wheeled round in circles, or whether they dived, or simply sailed onward in the air, they did it in pairs. As one was sweeping round another came to him. As one sailed straight on a second closely followed. After one had dived the other soon followed, or waited till he had come up and rejoined him. They danced and played in couples as if they were paired already. Some left the main body and steered right away from their friends, but turned and came back, and in about half-an-hour they all descended and settled in the oak from which they had risen. A loud cawing and jack-juck-jucking accompanied this sally.