It is curious that a near relative of this bird, the Great Australian Bustard (_Eupodotis australis_), also captures the wind to declare his love; but it is disposed of after a quite different fashion, being drawn into the gullet, though the precise manner in which it is manipulated demands further investigation. The display Dr. Murie described many years ago. It begins, he tells us, with a swelling of the throat, while the head is thrown upwards. Immediately after, the neck swells, and the feathers of the lower part of the neck, set all on end, are carried downwards, apparently surrounding a huge bag which reaches nearly to the ground. During all this time the head and neck are held rigid and point skywards, the head surmounting a great feathery column. Meanwhile the tail, as with the Great Bustard, is drawn forwards over the back. In this peculiar attitude the bird struts about in a stiff, waddling manner, the elongated neck-bag swaying to and fro and the feathers of the throat standing out in the shape of a great rounded swelling. The acme of inspiratory effort completed, the bird begins to snap the jaws together, producing loud noises, which are accompanied by a soft dove-like cooing. The Pectoral Sandpiper in like manner inflates its gullet. But, unlike the Pigeon and the bird just described, the neck is not markedly straightened, nor is the body raised. As the air is drawn in, the gullet expands, till it forms a great spherical drum. Then the excited performer runs along the ground uttering a resonant “too-u tooo-u” repeated seven or eight times in rapid succession, all the while he approaches nearer to the apparently very much-otherwise-engaged female. This effort failing, he will then often rise on quivering wings twenty or thirty feet into the air, and dive gracefully down again immediately afterwards, deflating this curious balloon to await a more favourable opportunity. In some species where wind-bags are employed as aphrodisiacs the outer skin is brilliantly coloured and exposed during the display. The Prairie-hen affords a case in point. In this species the air-chamber is furnished, not by the gullet, but by the air-sacs of the neck. When these are inflated they appear as two large orange-coloured bodies standing boldly out among the feathers. Their effect is heightened by a tuft of long stiff feathers which are thrust forward like a pair of horns, on each side of the head, while at the same time the feathers of the back are set on end, the tail is spread like a great fan, and the wings are half opened and trailed like those of the Turkey.