Orpheo 296 in Ritson Met. Of game they fonde grete haunt, Fesaunt, heron, and cormerant. C. 1381 Chaucer Parl. The hote cormeraunt of glotonye. In the Orient and elsewhere these glossy black underwater swimmers have been tamed for fishing.
Cormorants dive for and feed mainly on fish of little value to man.
Guano produced by cormorants is valued as a fertilizer. Cormorants inhabit seacoasts, lakes, and some rivers. The nest may be made of seaweed and guano on a cliff or of sticks in a bush or tree. The two to four chalky eggs, pale blue when fresh, hatch in three to five weeks, and the young mature in the third year. It and the slightly smaller Japanese cormorant, P. capillatus, are the species trained for fishing.