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What do skuas and jaegers eat on Arctic and Antarctic breeding grounds?

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Illustration of a crab plover (Dromas ardeola), showing a slender wading bird with long legs, a long pointed black bill, white head and underparts, and contrasting black wings and back. — Charadriiform Crab plover (Dromas ardeola)

On their Arctic and Antarctic breeding grounds, skuas and jaegers (family Stercorariidae) are predatory birds that consume a varied diet. They are known to prey on insects, rodents, and small birds. Additionally, they frequently target other seabirds—such as penguins, terns, and kittiwakes—to steal their eggs and young.123

These birds are also well-known for their kleptoparasitic behavior, often referred to as piracy; they harass other seabirds until the victims are forced to disgorge their food, which the skuas and jaegers then retrieve. In northern regions, their diet may also include carrion.312