As their name suggests, red and black carpenter ants have black abdomens with reddish-brown thoraxes and heads. Also known as Florida carpenter ants, this species is largely found throughout Florida and ranges in distribution north to North Carolina and west to Mississippi, with colonies that may contain up to eight thousand individuals.
Florida carpenter ants are most commonly nest around man-made structures with preferences for humid environments. Most are considered pests of minor importance, during their flight season Florida carpenter ants can often be found in very large numbers and they are considered one of the most serious structural pest species.
These bi-colored ants are among the largest ants found in Florida, making them apparent as they forage or fly indoors and out. Workers vary in size, ranging from 1/4 to 3/8 inch in length. Winged females (alates) are the largest reaching up to 3/4 inch in length. The thorax and head are ash brown to rusty-orange and the abdomen is black. Their many coarse, long body hairs are brown to golden brown in color and shorter than those on the body.