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. Breeding season Spring to Fall, depending on the species and location.įemale spiders often guard their eggs and young, or even carry them with them until the young have hatched and molted.The number varies among species and is affected by how well fed she is. How do they reproduce?Īfter mating adult female spiders lay dozens to hundreds of eggs. Unlike insects, some spider species keep growing after they become adults, and continue to molt as they get bigger. To grow they have to shed their exoskeleton, which they do many times during their lives. Spiders hatch from eggs, and the hatchlings look more or less like grown-up spiders, though sometimes their colors change as they age. These animals are found in the following types of habitat.There are even a few in shallow fresh water. Spiders survive in every habitat on land except the very coldest. That's not all of them though, there are thousands more we don't know about yet. Spiders are found on every continent, and there are over 40,000 species known to science. Also, spiders that live in peoples' houses often get moved around by accident when people move. Spiders are everywhere! Baby spiders are so light, they can put out a line of silk and float away on a breeze, and so they are spread around the globe. All spiders have fangs that they use to bite their prey with, and most have venom glands.įemale spiders are often much bigger than males. Different species of spiders have six or eight eyes, and the size and arrangement of eyes is different in different groups. These are used to grab prey, and in mating, and are much bigger in male spiders than in females. On the front of the cephalothorax are the mouth, the fangs, the eyes, and two small "mini-legs" called pedipalps. They have eight legs, all attached to the cephalothorax. The structures that produce the silk are called spinnerets. The abdomen contains the digestive and reproductive systems, and on the underside of it are the glands where silk is produced. All spiders have two body sections: the cephalothorax in front and an abdomen behind.
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