Giant ant

Giant ants are hostile creatures commonly found in the wasteland, including the former state of California, the Capital Wasteland, the Mojave Wasteland, the Commonwealth and Appalachia.

Background
According to the Enclave field research terminal entries, the creatures of order Hymenoptera, family Formicidae, and genus Camponotus were exposed to large levels of radiation, growing larger. 

Ant


Large and small forager ants make up the bulk of these ants' colonies, while soldier ants guard them to apply defense. Small, flight-enabled swarms also exist and act together as if by a hive mind in the group. Ants are not a serious threat, only being dangerous when swarming the player character due to encroachment of their territories.

Giant ant


Giant ants are large insectoids inhabiting the area earlier known as Northern California and Oregon, and tend to live in dark places, such as caverns, and can be found in Arroyo and Broken Hills. As they are insects they have three pairs of legs, and a powerful exoskeleton. They are also prone to turn into a frenzy, should their primary sense organ, their antenna, be damaged.

Giant ant queen


The heart of the swarm, a giant ant queen is significantly larger than drones and soldiers and capable of spitting acid at attackers. The queen is roughly four to five times larger than the average giant ant. When threatened, she buzzes her wings and will hiss at the enemy. She will then proceed to spit an acidic saliva at the enemy in an attempt to ward them off.

Giant soldier ant


These are the colony's main defense against intruders. They are plentiful and can often overwhelm an enemy by either running it off or killing it. This ant can often be found accompanying smaller ants as they forage.

Giant worker ant


These ants do most of the work around the colony.

Invader ant


Two of them may be found attacking the mutated forager ants in Shalebridge tunnels.

Mutated forager ant


They are friendly and won't attack, even if they are attacked.

Appearances
Giant ants appear in Fallout 2, Fallout 3, Fallout: New Vegas, the Nuka-World add-on for Fallout 4, Fallout 76, and Fallout Shelter.

Behind the scenes

 * Giant ants were planned for inclusion in Van Buren, the canceled Fallout 3 by Black Isle Studios.
 * Ants are mentioned in the Fallout Bible.