They are primarily found in warmer, tropical climates. Most Wandering Spiders found in North America were imported on tropical fruits, like bananas. The Southeastern Wandering Spider, however, is native to the southeastern part of the continent.
Details of the:
Southeastern Wandering Spider
Common name: Southeastern Wandering Spider
Scientific Name: Anahita punctulata
Size (Adult, Length): 5mm to 40mm (0.20in to 1.57in)
Identifying Colors: brown; tan; ivory; white; black
Additional Descriptors: large, biting, venomous
North American Reach (Though Not Limited To*): Alabama, Arizona, Florida, Georgia, Louisiana, Mississippi, Nevada, New Mexico, North Carolina, South Carolina, Tennessee, Texas
* Keep in mind that an insect's reach is not limited by lines on a map and therefore may appear in areas/regions/states beyond those listed above.