The black and brown widow are spiders you also want to avoid.
The black widow is widely known, but here's a pic of the brown widow.
(You need to Login or Register to view media files and links) Many people get these confused with the brown recluse. North Carolina is normally considered outside of the range of the brown recluse and many bites blamed on the brown recluse are actually widow bites, wounds of an infectious nature, etc... Many other spiders resemble the brown recluse and brown widow (such as the funnel web, wolf spider, etc..), so when in doubt err on the safe side.
Here's a map of the normal area of the brown recluse;
(You need to Login or Register to view media files and links) There have been confirmed brown recluse sightings in South Carolina (very few), as the site below illustrates, and it's thought their territory may be expanding. So I would say coming across one in NC is not out of the question. Again, better to be safe than sorry. Fortunately, like widow spiders they generally like hidden places near ground level.
I've often said that the day widow or brown recluse spiders start spinning webs between trees is the day I quit mountain biking and retire to Sun City or something.
Here's a great site listing poisonous spiders/snakes by state and info about each.
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