What do spiders look like? There are around 4,000 species of spiders in North America, and they all differ in some way in their characteristics. That being said, we have only 2-3 medically significant spiders in the US that would pose a threat by infesting a structure.
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Once you determine if you have spiders, read our guides on how to inspect for spiders, how to treat for spiders, and how to prevent spiders.
The shape of the spider will be based on the species.
- Spiders have eight legs
- Spiders have fangs to inject venom into their prey
- Spiders may have 2, 4, 6, or 8 eyes
- Spiders have spinnerets located near the rear end, which are used to push out silk to make webs
- Spiders do not have bones
- Spiders do not have ears
- Spiders do have brains
- Some spiders have lungs called "book lungs"
- Spiders have two main body parts, or segments




