Nepidae is a family of exclusively aquatic Heteropteran insects in the order Hemiptera. [1] . They are commonly called water scorpions for their superficial resemblance to scorpions, due to their raptorial forelegs and the presence of a long slender process at the posterior end of the abdomen, resembling a tail. [2] .

water scorpion, any of the approximately 150 species of aquatic invertebrates of the family Nepidae (order Hemiptera). The water scorpion resembles a land scorpion in certain ways: it has scythelike front legs adapted for seizing prey and a long, thin, whiplike structure at …

2021年10月30日 · Water scorpions typically have a dark brown or black body color, and can vary in size and shape depending on species. Many species are thin, long and stick-like, while others are more stout, and round in shape! There are over 150 species of water scorpion, and each one is unique in some way.

The southern water scorpion, Ranatra australis, is the most common species of Ranatra found in Florida, it is also found in many other southern states including Virginia, Texas, and Louisiana (Herring 1951, Bick et al. 1953). They can be found near both fresh water and saline water.

An underwater predator, the water scorpion hides among dead leaves where it waits to ambush its prey (such as tadpoles and small fish) with its grabbing pincer-like legs. It is known to bite, but its not very painful for humans. It lives in still-water ponds and lakes, and is common around the shallow edges of garden ponds.

蝎蝽属 肉食性 昆虫,成虫及若虫捕食 水蚤 、蚊幼、 椎实螺 、 扁卷螺 、 蜻蜓 及 豆娘 的若虫;成虫可追捕刚孵化不久的鱼苗和小蝌蚪。 此虫为益害兼有种类. 分布于广东、 辽宁 、河北、山西、北京，河南、江苏、福建、浙江、江西、山东、湖北、湖南、重庆、四川、安徽、海南。 成虫 体长37-40毫米，宽10-11毫米。 体型扁平，深褐至灰褐色。 头小;复眼球形，外突，黑色。 前胸背板 宽于头部。 翅覆盖在腹部背面; 前翅 膜片黑色，有问状脉纹。 前足发达，为 捕捉足;中、后足为 …

2023年10月13日 · Water scorpions, belonging to the genus Ranatra, are fascinating aquatic insects. They might look intimidating with their mantis-like grasping forelegs and slender, needle-like appendages, but they don’t pose any threat to humans. In fact, water scorpions play an essential role in aquatic ecosystems by feeding on small aquatic prey.

Ranatra is a genus of slender predatory insects of the family Nepidae, known as water scorpions or water stick-insects. [1] There are more than 140 Ranatra species found in freshwater habitats around the world, both in warm and temperate regions, with the highest diversity in South America (almost 50 species) and Asia (about 30 species ...

Nepa cinerea is a species of water scorpion (Nepidae), found in most of Europe, including the British Isles, as well as North Africa and southern and northern Asia. [2] It lives in ponds, small rivers, and stagnant water, and feeds upon aquatic animals, especially insects.

2012年6月29日 · Water scorpions of the genus Ranatra can be found throughout eastern North America. They occur in quiet or still bodies of water, typically in shallow waters with abundant plant life. However, they are also quite tolerant of deoxygenated or polluted waters.