Water striders (Hemiptera: Gerridae) are predators found on the water surface that prey mainly on arthropods. The feeding on other organisms (dead vertebrates, fishes and tadpoles) is a rare event. To our knowledge, predation of frog eggs by water striders has not yet been reported. We observed that adult water striders, Gerris latiabdominis Miyamoto, 1958 (Hemiptera: Gerridae), preyed on the eggs of three frog species, Pelophylax nigromaculata Hallowell, 1861 (Anura: Ranidae), Rana japonica Boulenger, 1879 (Anura: Ranidae), and Rhacophorus schlegelii Günther, 1858 (Anura: Rhacophoridae). We found predation by the water striders affects the survival rate of frog eggs floating on the water surface. We suggest that this hunting event would occur in water bodies in which water striders and frogs coexist, especially the region where their phenology overlaps.

中文翻译：

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水黾Gerris latiabdominis Miyamoto（半翅目：Gerridae）捕食蛙卵

水黾 (Hemiptera: Gerridae) 是在水面上发现的捕食者，主要捕食节肢动物。以其他生物（死脊椎动物、鱼类和蝌蚪）为食是一种罕见的事件。据我们所知，尚未有水黾捕食蛙卵的报道。我们观察到成年水黾, Gerris latiabdominis Miyamoto, 1958 (Hemiptera: Gerridae), 捕食三种青蛙的卵, Pelophylax nigromaculata Hallowell, 1861 (Anura: Ranidae), Rana japonica Boulenger, 1879 (Anura: Ranidae) Rhacophorus schlegelii Günther, 1858 (Anura: Rhacophoridae)。我们发现水黾的捕食会影响漂浮在水面上的蛙卵的存活率。我们认为这种狩猎事件会发生在水黾和青蛙共存的水体中，