This bird pelecaniforme Phalacrocoracidae family. Waterfowl, dives in search of fish and remains a long time under water and will appear again right up front, showing only the neck above water. To facilitate your dives, its feathers are completely wet, eliminating the air which lies between the feathers and difficult dives. To dry them is common to see them perched with outspread wings to the wind. Almost always seen in large flocks flying around water, forming a "V". When flying resemble ducks, and is sometimes mistakenly considered as such. They are also known by the names of biguá-one, imbiuá, loon, duck and miuá waterline. Because it is entirely black, receives the common name, too, cormorant.
Its geographical distribution extends from southeastern Arizona (USA) to Tierra del Fuego, the southernmost tip of South America (AOU 1998) (SICK 1997).