Ges鋟mter Fadenschwimmk鋐er; Laufk鋟ferartiger Kolbenwasserk鋐er; Gefurchter Fadenschwimmk鋐er; Dyticus marginalis; Hydrous caraboides; Acilius sulcatus; Hydroporus elegans; Cnemidotus caesus; K鋐er; Insekt; Landtier; Tier; Zoologie; Zoologiebildbild; s/w; Lined thread diving beetles; water beetles piston-like drive buyers; furrowed thread diving beetles; Dyticus marginalis; Hydrous caraboides; Acilius sulcatus; Hydroporus elegans Cnemidotus caesus; beetles; insect; animal land; animals; zoology; zoology picture image; black and white image; black-and-white