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Description
Photography and editing - Uri Rosenberg Music - Ensemble "TBILISI" Two genera of water insects are shown in this video: BACKSWIMMERS (Notonectidae) and WATER STRIDERS (Gerridae). Both belong to the order Hemiptera (bugs). Backswimmers swim on their back, upside down. Water striders walk on the water, using the water surface tension. As you can see, they capture small air bubbles by their legs that help them to keep floating. More details on how they walk on the water can be seen here: (MIT research) - http://www-math.mit.edu/~dhu/Striderweb/striderweb.html בסרטון נראים שני סוגים של חרקי מים, שהם פשפשים טורפים. רצי המים הולכים על המים בנצלם את מתח הפנים של קרום המים וכן בעזרת בועות אוויר קטנות שלוכדות רגליהם. השטגביים שוחים על גבם. צולם בנחל עמוד.
