苍穹变The individual figured is a fine specimen, but is not yet in perfect plumage.

h not so well fitted for them by physical conformation.

苍穹变 

in this case are said by Buffon to act in concert, and to show no little skill in man?uvring with the view of securing a plentiful quarry, forming themselves into a circular line, and gradually narrowing the extent of the space enclosed, until they have driven the fishes into so small a compass as to render them a certain prey; when at a given signal they all at once plunge into the water and seize upon their terrified victims, filling their pouches with the spoil, and flying to the land, there to devour it at their leisure. This fishery is carried on both at sea and in fresh water.
obvious by the nails by which they are surmounted, are externally visible. On the hind feet the number of apparent toes varies from three to four.