Water Striders Gliding on the Surface of a Pond Surrounded by Rocks

water striders pond gliding surface water insects rocks nature aquatic reflection ripple calm wildlife macro ecosystem freshwater habitat skimming walking float serene peaceful outdoor wilderness buoyancy surface tension entomology pond life skaters delicate balance natural environment tranquil sunlight flora fauna pondskaters gerridae arthropods predators hydrophobic legs survival adaptation stillwater undisturbed clear