Data are from Millones et al. (2005) and Frere (personal observations)
In the Atlantic coast, diet of the Red-legged Cormorant is diverse, being composed mainly by benthic species, which is consistent with the diving behavior of this bird. Nevertheless, the occurrence of meso-pelagic prey also is important, especially during the breeding season. Fish are the most frequent prey: Patagonotothen spp. during the nonbreeding season, and the sardines Sprattus fuegensis and Ramnogaster arcuata during the breeding season. Other items in the diet are cephalopods (Loligo gahi), bivalves, polychaetes, and crustaceans (crabs). The seasonal changes registered in the occurrence of some of the prey and the shortage of dominant preys in the different periods of the year suggest an opportunistic feeding behavior in this cormorant.