Spider Homepage Spiders are small, eight-legged creatures that are best known for spinning silk webs. Spiders spin webs so they can catch insects for their food and even larger and stronger insects cannot escape. All spiders spin silk but some don't spin webs. Bolas spiders spin a single line with a sticky end. Any insect near, gets trapped when the spider swings the sticky line near them.
All spiders have fangs and most kinds have poison glands.
They use their fangs and poison glands to capture their food. A spider's bite can kill insects and other small animals. A few kinds of spiders are harmful to human beings. Four of the Widow females are known to bite humans. The bites of these six spiders often cause mild reactions.