Biston betularius.JPG Biston betularius (2)ThumbnailsBiston strataria (2)Biston betularius (2)ThumbnailsBiston strataria (2)Biston betularius (2)ThumbnailsBiston strataria (2)Biston betularius (2)ThumbnailsBiston strataria (2)Biston betularius (2)ThumbnailsBiston strataria (2)Biston betularius (2)ThumbnailsBiston strataria (2)Biston betularius (2)ThumbnailsBiston strataria (2)
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