George Hammond (author), Animal Diversity Web.The Goliath birdeater is the king of spiders. Ways that people benefit from these animals:.Spiders eat a lot of insects that are agricultural pests and eat our food. Ways that these animals might be a problem for humans.Most spiders have such small weak fangs that they couldn't break a person's skin, even if they wanted to. They get blamed for a lot of skin injuries that are not actually spider bites. A few spider species have venom that is dangerous to people, but spider bites are actually pretty rare. Spiders scare a lot of people (usually this is unnecessary). Spiders are major predators of insects, including many insects that are pests to humans. What roles do they have in the ecosystem? These may use their silk as a safety line, jumping off into the air with a silk thread attached so they don't fall. Some are quick runners, and will just run away if they can. Many spiders build a retreat of silk to hide in too. Spiders often have good camouflage, and many of the wandering hunter species hunt at night when big predators can't see them. What eats them and how do they avoid being eaten? Spiders are famous for trapping their prey in webs of sticky silk, but many of them are wandering predators who don't use silk to catch prey. A few very large spider species attack small vertebrates like lizards, minnows, or frogs, but this is rare. They attack only live insects, other spiders, and other invertebrates. What do they eat?Īll spiders are predators. Most don't see very well, but the Jumping Spiders see very well. Spiders are very sensitive to vibrations, especially in their webs. A few tropical species live in groups in really big webs. Many species make complicated webs to trap prey and give themselves protection. Nearly all spiders live as solitary hunters, only finding another of their species to mate. Usually males die soon after they mate, it's only the females that can live longer. Most spider species live a year or less, but some large ones can live for several years.
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