birdphoto | Great-crested Grebe Podiceps cristatus male in aggressive posture Lake Geneva Switzerland

Great-crested Grebe Podiceps cristatus pair in head shaking courtship ritual Lake Geneva Switzerland

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Great-crested Grebe Podiceps cristatus male in aggressive posture Lake Geneva Switzerland

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Great-crested Grebe Podiceps cristatus performing weed dance as part of courtship display Lake Geneva Switzerland

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