These are usually caused by other factors including diseases or medical conditions and bacterial skin infections. Most people and even medical doctors over-diagnose “potential spider bite” based on symptoms such as redness, swelling, cramps, severe pain, or even necrotic lesions. Most spiders are harmless to people and are incapable of biting, even when coaxed. Silk produced by young spiders helps them to move with the wind in a process called ballooning. Spider silk is used to build webs and other types of snares that capture prey, and to make egg cases, draglines, shelters and retreats.Silk is produced by all spiders as a liquid in specialized structures called spinnerets located at the tip of the abdomen. They liquefy their food with digestive fluids and then suck in the digested food.All spiders inject venom through their hollow fangs into living prey to disable the prey.They do not survive well indoors and usually do not reproduce indoors.They live outdoors but may enter into homes accidentally, particularly in the fall.Passive hunters lie in wait and capture prey as it approaches.Active hunters search for and chase their prey.They are quick and have good eyesight that helps them to capture prey.Hunting spiders are outdoor spiders that may wander indoors accidentally. Some species of web-building spiders can survive and reproduce well indoors and outdoors.
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