When thus hovering motionless the wings are seen to beat rapidly for a few seconds, then to become fixed and rigid for a moment or two, after which the beating motion is renewed. A short time ago I watched a kestrel thus hovering in the face of a very violent wind, and it struck me that this suspension of the wings’ motion in such circumstances was very extraordinary and hard to explain. One can understand that, even in the face of a violent gale, the bird is able to maintain its motionless position by sheer muscular power; but how happened it that in the short intervals, when the outspread wings became fixed and motionless, the bird was not instantly blown from its position? In its breeding habits the kestrel, like the starling and jackdaw, has a partiality for towers and lofty ruins, and it also nests in holes in rocks and hollow trees. In woods it frequently takes possession of a disused nest of a crow or magpie. The eggs are four or five, blotched with dull red on a reddish white ground; and in many eggs the ground-colour is quite covered with red. The kestrel, among British birds of prey, is a favourite with the ornithologist in virtue of its interesting habits; and it deserves to be equally esteemed by the farmer on account of its usefulness. It is, indeed, the only bird of diurnal habits that wages incessant warfare against the prolific and injurious mice, and thus carries on by day the task of keeping down a pest which those ‘feathered cats,’ the owls, so efficiently pursue at night.