Comments: Eats mainly fishes, especially menhaden, mullet, sardines, pinfish, and anchovies in U.S. waters; sometimes euphausiids; dives into water from air (USFWS 1980). Feeds by diving in deeper water, by swimming, sometimes in cooperative groups, in shallower water (Hilty and Brown 1986). Rarely reported scavenging or preying on eggs or young of water birds. Forages in shallow estuarine and inshore waters mostly within 10 km of the coast (Johnsgard 1993).
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