The answer to 'signs of fire ant' is that the most common signs of fire ants include small mounds of soil in your yard, often with a hole in the center, as well as aggressive swarming and biting when the mound is disturbed. Fire ants build their nests in the ground, typically in sunny, open areas like lawns, gardens, and fields. Their mounds can grow to be 18 inches tall and several feet wide.
In addition to the visible mounds, you may also notice fire ants crawling on the ground or on plants. They have a reddish-brown color and are quite small, usually around 1/8 to 1/4 inch long. Fire ants are known for their painful, burning sting that can cause itchy, swollen bites on humans and pets.