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2. Windrichtung und Vegetationsdeckung am Nest der Silbermöwe(Larus argentatus)
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4. Breeding adaptations of Franklin's gull (larus pipixcan) to a marsh habitat
5. Determinants of Colony and Nest-Site Selection in the Silver Grebe (Podiceps occipitales) and Rolland's Grebe (Rollandia rolland)