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| Stercorariidae - Skuas | |||
| Chilean Skua | Catharacta chilensis | monotypic | |
| South Polar Skua | Catharacta maccormicki | monotypic | |
| * Subantarctic Skua | Catharacta antarctica antarctica | ||
| * Subantarctic Skua | Catharacta antarctica lonnbergi | ||
| Pomarine Skua | Stercorarius pomarinus | monotypic | |
| Arctic Skua | Stercorarius parasiticus | monotypic | |
| Long-tailed Skua | Stercorarius longicaudus longicaudus | ||