I found this black carpenter ant crawling around at a park in Charlotte. I took this picture around 1:00pm.
According to Insect Identification, “Black Carpenter Ants do bite, though they cannot sting. Another defensive maneuver they use is spraying formic acid at a possible threat. All members of the family Formicidae build up an internal store of formic acid and use it to ward off predators.” (http://www.insectidentification.org/insect-description.asp?identification=Black-Carpenter-Ant)