Chap. 55 (39.) — The Birds Called Apodes, or Cypseli
Those birds which are known as “apodes”3035 fly the most of all, because they are deprived of the use of their feet. By some persons they are called “cypseli.” They are a species of swallow which build their nests in the rocks, and are the same birds that are to be seen everywhere at sea; indeed, however far a ship may go, however long its voyage, and however great the distance from land, the apodes never cease to hover around it. Other birds settle and come to a stand, whereas these know no repose but in the nest; they are always either on the wing or else asleep.