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Spiders (order Araneae) are air-breathing arthropods that have eight limbs, chelicerae with fangs generally able to inject venom, and spinnerets that extrude silk. They are the largest order of arachnids and rank seventh in total species diversity among all orders of organisms.
May 29, 2024 · Learn about spiders, the arachnids with eight legs and silk glands, from Britannica. Find out how spiders hunt, build webs, distribute, and vary in size and appearance.
- Harmful Spiders?
- How Spiders Eat and Hunt
- Threats
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For most people, the thought of spiders conjures up images of tarantulas, wolf spiders, and other (seemingly) fearsome creatures. Though all spiders have venom to one degree or another, only a handful are dangerous to humans. Those include the black widowand the brown recluse, both found in the United States. The vast majority of spiders are harmle...
Most species are carnivorous, either trapping flies and other insects in their webs, or hunting them down. They can’t swallow their food as is, though—spiders inject their prey with digestive fluids, then suck out the liquefied remains. Though not all spiders build webs, every species produces silk. They use the strong, flexible protein fiber for m...
The greatest threat to spiders is habitat loss, although some spider species are also threatened by the pet trade.
Learn about the diversity, behavior, and ecology of spiders, the arachnids with more than 45,000 species. Find out which spiders are harmful, how they hunt and eat, and how they use silk for various purposes.
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Sep 15, 2023 · Common types of spiders, including house and garden spiders with pictures for easier identification.
- Common House Spider (Parasteatoda tepidariorum) The common house spider, or Achaearane tepidariorum, is the most common type of spider you’ll find in your home.
- Cellar Spider (Pholcidae) As the name suggests, a cellar spider’s favorite place to hang out is in your cellar or basement. There are two kinds of cellar spider: the short-bodied cellar spider and the long-bodied cellar spider.
- Harvestmen (Opiliones) Harvestmen, or daddy long-legs, are not actually spiders at all. We’ll still include them on the list here because they look like spiders and everyone associates them with such.
- Jumping Spiders (Salticidae) There are several different kinds of jumping spiders. Rather than covering them all here, we’ll simply cover the basics. All jumping spiders are part of the family Salticidae.
Learn more about spiders, their origins and how they are classified: What is a spider? Spider facts; Spider origins; Classifying spiders; Spiders are everywhere; Glossary of spider terms. Read stories from our Arachnology Collection: Mysterious Marine Spiders in Sydney Harbour; Stone Centipedes - Living Fossils.
Nov 5, 2014 · Spiders are grouped according to the type of web they make, according to the San Diego Zoo. Groups include tangle-web spiders, orb-web spiders, funnel-web spiders and nursery-web spiders.
