Spider-egg-predator
Guides
Trimerina madizans
shore fly
Trimerina madizans is a species of shore fly in the family Ephydridae. The species was described by Fallén in 1813. Larvae are specialized predators of spider eggs, an unusual feeding strategy among Diptera. It occurs across northern and central Europe.
Zeugomantispa
Green Mantidflies
Zeugomantispa is a genus of small predatory mantidflies in the family Mantispidae, commonly known as green mantidflies. The genus contains at least three described species distributed in the Americas, with Zeugomantispa minuta being the most frequently encountered and commonly called the green mantisfly. Adults are sit-and-wait predators that ambush small soft-bodied insects, while larvae are specialized predators of spider eggs within egg sacs. The genus is distinguished by its green coloration and raptorial forelegs that resemble those of praying mantises, though the two groups are not closely related.