- More than 3,000 Species in North America
- Two U.S. species are considered dangerous -- Black Widow and Brown Recluse
- Since they feed mainly on insects and other small arthropods, spiders indicate presence of other household pests
- Females can lay up to several hundred eggs in a silken sack
- Spiders can survive for up to three months without food
- Spider bites may occur when people clean out neglected areas or put on seldom worn clothing.