What are army ants?

Army ants are fierce hunters. Most species travel across the land in narrow columns while others hunt underground, moving through tunnels in the soil. Army ants prey chiefly on other insects and spider. In some cases, they also kill and eat larger animals that cannot escape quickly. Most army ant colonies have between 10,000 to several million members. Army ants that live above ground do not build permanent nests. When they rest, they cling together in a large cluster. They may hang from the branch of a tree or roost inside a hollow log or other suitable place. The queen and her brood nest within the large cluster of bodies. Some kinds of army ant hunt for a few weeks and then rest for a few weeks. During the hunting periods, they may nest at a different site every night. During the resting periods and they stay in one place, and the queen lays hundreds or thousands of eggs.