The largest spider in the world is a species of tarantula found in South America where one specimen had a leg span of over 11 inches.
Spiders don't get caught in their own webs because they have self-oiling legs.
Many people associate spiders with webs, but the truth is not all spiders spin these silk structures, which are used to catch their prey. In fact, several species of spiders use different strategies for obtaining food.
There are about 3,000 species of spiders roaming around North America, but only two in the southern and western United States can cause serious harm when accidentally disturbed — the black widow and brown recluse.