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Seagulls picking the perineal area of South American fur seals at Guafo Island. (a) A kelp gull (Larus dominicanus) engages in the picking of a fur seal pup perineal area after this pup has defecated. A dolphin gull (Leucophaeus scoresbii) observes from a few metres away. (b) A dolphin gull eats rests of faeces and picks the perineum of the same fur seal pup showed in (a), after the kelp gull has left the area.
