Antlion

Antlions are voracious insect-like alien creatures which inhabit the Half-Life universe in great numbers. They are social creatures which live in large underground colonies. The most common variety of the species is known simply as an Antlion, however their society is made up of a number of different strains which serve different roles. This article concerns the common Antlion.

Appearance
Antlions have four legs, are about waist high compared to a fully grown man, and are normally tan coloured with tints of green, purple, and yellow. Underneath its carapace are wings which allow it to fly short distances. Antlions have a triangular shaped head which possess sharp mandibles. Antlions do not have eyes, and instead rely on keen senses of smell and vibration.

Behaviour and Capabilities
Antlions are rapacious pack predators. Their favoured method of accosting prey is to bury themselves in soft sand, sense for vibrations in the sand, then emerge and ambush the intruder. They usually form swarms so large that even a well-armed opponent will be quickly overwhelmed. Although they are blind they are extremely sensitive to vibration, which allows them to follow their enemies wherever they go once detected. This sensitivity can be turned against them; thumpers, machines which pound the ground rhythmically, overload their senses and prevents them from advancing on prey near them.

Antlions attack with their sharp claws and teeth. Those fleeing on foot or seeking higher ground will find no sanctuary from them; they will fly at opponents above or a distance away from them. They will fearlessly attack and pursue their target regardless of hazards they are faced with, and will continue charging even as fellow Antlions die in front of them. This includes charging into moving vehicles and into water, despite the fact they cannot swim. Antlions are both fiercely territorial and invasive. They will sweep into territory neighbouring if it is not properly protected.

Pheromone Pods
Common Antlions defer overall leadership to Antlion Guards, who direct them through the use of pheromones. Harvesting pheromone pods (through an unhygienic extraction method practiced by Vortigaunts) from the body of a Myrmidon will allow a user to control Antlions. Users can command Antlions to follow by applying pressure to the pod. The user can also make Antlions move to a certain spot by throwing the pod to that spot. These pods do not provide protection against other Antlion Guards.

Society
Common Antlions are the most visible element of a larger Antlion society, most of which is kept hidden in fiercely defended underground nests. It is not clear how Antlions breed. One resistance member is heard referring to a "spawning season" at the beginning of the Highway 17 chapter, but whether Antlions mate separately, have a queen/drone system or practise something completely alien to Earth sensibilities is not known. Their young begin life as larvae in blue honeycombs similar to those of bees. The extract of these larvae is highly prized by the Vortigaunts for its healing properties. These larvae grow into large grubs, which are attended to and protected by Antlion Workers and Antlion Guardians. Within this system common Antlions presumably serve as hunter gatherers. Inside their nests decomposed bodies can often be discovered, trapped in the viscous silk the grubs produce, and some of their deepest chambers are pooled with blood.

History
Antlions were once farmed by Vortigaunts on their homeworld for their larval extract and a number of other purposes; Freeman's Vortigaunt companion is heard commenting that the Antlion Grubs are "tasty". Since the Combine invasion of Earth and the beginning of the portal storms they have established themselves on Earth. They have obviously been very successful in doing so, possibly to the point of causing extinction to other kinds of Earth fauna. So widespread were the Antlions on Earth that the Combine had to install a large network of thumpers around Nova Prospekt, as well as a vast variation to the base of the Citadel. When these were shut down by Gordon Freeman's activities, both Nova Prospekt and City 17 were quickly overrun by Antlions, with chaotic results.

Counter Measures

 * Antlions are generally easy to kill, but are almost always encountered in numbers. Often once one has been killed, another will emerge from sand or a burrow.  Antlion burrows can be blocked with large objects such as cars.


 * The best way to kill Antlions is from a distance, as their melee attacks are quite powerful, and will cause you to flinch, making your aim awry.


 * You can knock Antlions over with the Gravity Gun.


 * If you have pheropods, you can control Antlions. If you are having trouble getting through an area guarded with Sentry Turrets or soldiers, use your Antlions as a distraction. Antlions make very good area testers. Throw pheropods ahead if you think an area could be dangerous.


 * Antlions in Episode Two are generally not infinite in number, as was the case in Half-Life 2 and Episode One. Stepping on their Grubs will not summon them, as was suggested in press releases.


 * Antlions will drown if you lure them into water, this is useful when you first encounter them in Half-Life 2.

Trivia
The Antlion's sensing prey through feeling vibrations through the ground, then burrowing up and eating said prey, is a likely tribute to the Tremors film series, and is also similar to the Sandworms of the Dune series. They also seem to resemble the Arachnid (Bugs) From Starship Troopers.