The following summary is based on Brooke (2004).
Feeding almost entirely aerial, by dipping (73% of observations) or pattering (27%: Harper 1987). May occasionally dive to shallow depths to retrieve food (Murphy 1936). Ridoux (1994) summarizes several studies that show diet during the breeding season to be dominated by crustacea, either euphausiids and amphipods at subantarctic sites ormainly euphausiids near Antarctica. In the Ross Sea, however, Ainley et al. (1984) found cephalopods (46% by weight) to be almost as important as euphausiids (36%). Fish also are consumed, and at South Georgia, are all myctophids 50-85 mm long (Croxall et al. 1988). Diet outside the breeding season is poorly known, but probably includes crustacea, small fish and their eggs, mollusks, nereid worms, oil droplets, and cetacean feces (Cramp and Simmons 1977, Marchand and Higgins 1990). Studies have shown conflicting results as to whether olfaction is key for finding food (Jouventin and Robin 1984, Nevitt 1999).