A third instance is the crow. Hated by all gamekeepers, and sportsmen, by farmers, and every one who has anything to do with country life, the crow survives. Cruel tyrant as he is to every creature smaller than himself, not a voice is raised in his favour. Yet crows exist in considerable numbers. Shot off in some places, they are recruited again from others where there is less game preservation. The case of the crow, however, is less striking than that of the two hawks; because the crow is a cosmopolitan bird, and if every specimen in the British Isles were destroyed to-day, there would be an influx from abroad in a very short time. The crow is, too, partly a sea-coast feeder, and so escapes. Still, to any one who knows how determined is the hostility to his race shown by all country people, his existence in any number must be considered remarkable. His more powerful congener the raven, as has been pointed out, is practically extinct in southern counties, and no longer attacks the shepherd's weakly lambs. Why, then, does the crow live on? Wherever a pair of ravens do exist the landowner generally preserves them now, as interesting representatives of old times. They are taken care of; people go to see them; the appearance of eggs in the nest is recorded. But the raven does not multiply. Barn-owls live on, though not in all districts. Influenced by the remonstrance of naturalists, many gentlemen have stopped the destruction of owls; but a custom once established is not easily put an end to. Jays and magpies have also been subjected to a bitter warfare of extermination. Magpies are quite shot off some places; in others they exist sparingly; here and there they may be found in fair numbers. Occasionally their nests are preserved--indeed, the growing tendency is to spare. Still, they have been shot off rigorously, and have survived it. So have jays. In large woods--particularly where there is much fir--jays are so numerous that to destroy them seems almost impossible. Another bird that has defied the gun and trap is the green woodpecker, which used to be killed for alleged destruction of timber. Woodpeckers are not now so ceaselessly killed, though the old system of slaying them is common enough. They have defied not only gun and trap, but the cunning noose placed at the mouth of their holes.