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90 them off. The originating cause would have ceased or subsided, but the excitation consequent on the bodily activity which had been thus aroused would require a further outlet, and this might pass in time into some prescribed play or antic which might afterwards be indulged in for its own sake.

My other instance is that of the oyster-catcher. If anyone will watch these birds closely, he may see three of them go through a performance bearing the same sort of resemblance to that of the spur-winged lapwing, that the combs of the humble-bee do to the more perfect ones of the hive-bee. He may see, for instance, two standing side by side with their heads bent forwards and downwards, as the two lapwings bend theirs, though here the length of the brilliant, orange-red bills, the tips of which, also, almost touch the ground, make the angle of inclination a much lesser one. In this attitude they both of them utter a long, continuous, piping note, of a very powerful and penetrative quality, sometimes swaying their heads from side to side as though in ecstasy at their own performance, and seeming to listen intently in a manner strongly suggestive of the musical connoisseur. The third bird, who is obviously the female, either stands or walks at a short distance from the two pipers, who will frequently follow and press upon her, and then, though the march is not quite so formal and regular, it yet bears for a few moments a considerable resemblance to that of the spur-winged lapwing, as described and figured in Mr Hudson's work. Of course, there is really no march at all in the proper sense of the word, but there is the occasional resemblance, and