Motmot

Arctic Skua vs White-chinned Petrel

Stercorarius parasiticus versus Procellaria aequinoctialis

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Arctic Skua (Stercorarius parasiticus) Arctic Skua
White-chinned Petrel (Procellaria aequinoctialis) White-chinned Petrel

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Arctic Skua · White-chinned Petrel · My Tricky Birds