Nebraskaland

August-September 2026 • Nebraskaland 39 What Is a SpIder? Spiders belong to a group of animals called arachnids, which also includes scorpions, ticks and mites. Unlike insects — which have six legs and three body segments — spiders have eight legs and two main body sections: the cephalothorax (where the legs attach) and the abdomen. All spiders are predators, using venom and silk to catch their prey, though only a handful of species worldwide pose any danger to humans. In Nebraska, we have dozens of spider species, ranging from tiny crab spiders that ambush pollinators on flowers, to wolf spiders that actively chase their prey on the ground. Orb-weavers are part of the "web- building" group of spiders. Not every spider spins a web, but every single one can make silk. MaSterS of Web DeSign Orb-weaver webs are true works of engineering. Strong yet flexible, these webs can stretch several feet across and are perfectly positioned to catch anything that flies or crawls by. What's impressive is how carefully these spiders build and maintain their webs. Many orb-weavers take their webs down each evening, consuming the silk to recycle its proteins, then spin a fresh web by morning. This daily routine keeps the web sticky and functional — ready to catch the next meal — and it also helps repair damage caused by wind, rain or wandering insects. Zig-zag patterns are woven into some webs. This is called a stabilimentum, and scientists are still debating its exact purpose. Some think it helps strengthen the web; others believe it makes the web more visible to birds, so they don't accidentally fly through and destroy it. There's also evidence that the stabilimentum reflects ultraviolet light, which could attract insects by mimicking the colors of flowers. In some species, the pattern may even serve as a sort of warning, signaling, "Hey, I'm here!" to other animals. Every strand in an orb-weaver's web is calculated. The radial lines act like scaffolding, the spirals are sticky trap lines, and even the spacing of the silk can influence which types of prey are most likely caught. Patient anD PrecIse HunterS Unlike wolf spiders or jumping spiders that actively chase down prey, orb-weavers are true sit-and-wait predators perched patiently in the center of their intricate webs. Their legs are incredibly sensitive, able to detect the tiniest vibration from a struggling insect, whether it's a fly, moth or grasshopper. When prey wanders into the web, the orb-weaver springs into action. It rushes out, wraps the insect tightly in silk and delivers a venomous bite to subdue it. Nebraska's orb-weavers play a big role in keeping insect populations in check, catching pests like mosquitoes, leafhoppers and aphids before they become a nuisance. Some of the most common species include the yellow garden spider (Argiope aurantia) and the marbled orb-weaver (Araneus marmoreus), which is smaller but just as skilled at trapping insects. apPrecIating the Web buIlDers You can find orb-weavers in a wide range of habitats in Nebraska — from backyard gardens and schoolyards to prairies, wetlands and forest edges. Some of the larger species, like the yellow garden spider, are impossible to miss, while smaller spotted orb-weavers may go unnoticed. Regardless of size, each web is a testament to the spider's skill and persistence. They're living reminders of the tiny engineers sharing our world, quietly keeping insect populations in balance and adding a touch of wonder to the landscape. N A yellow garden spider (Argiope aurantia) at Wagon Train State Recreation Area has captured a grasshopper in its web and begun wrapping it in silk. Photo taken at Wagon Train State Recreation Area. MONICA MACOUBRIE A yellow garden spider (Argiope aurantia) sitting on its web at Niobrara State Park. KEN BOUC, NEBRASKALAND A marbled orb-weaver spider rests on a plant. This species is sometimes called the "pumpkin spider" because the female's rounded, orange abdomen resembles a small pumpkin. ERIC FOWLER, NEBRASKALAND RADIAL LINE SPIRAL LINE

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