Aenictus asantei

Aenictus asantei

These West African army ants have a distinctive look that sets them apart from other ants. Workers are dark reddish-brown, about 3.5 to 4 mm long, with unusually long mandibles that cross over each other when closed ^[1]. They are completely blind, they have no eyes, and find their way using chemical trails laid by their nestmates ^[2]. Found in Ghana and Nigeria, they live in coastal scrub, grassland, and farmland near the coast ^[1]. Unlike some army ants that swarm in huge masses, Aenictus asantei raids in columns, branching lines of workers that hunt for prey ^[2]. They are specialist predators of other ants, particularly Pheidole species, collecting both adults and young to eat ^[2].

Quick Summary

• Difficulty: Expert
• Origin & Habitat: Ghana and Nigeria, West Africa. Found in coastal scrub, grassland, and cultivated areas such as cassava and cocoa plantations ^[2][1].
• Colony Type: Unknown structure for this species. Army ants typically maintain large single-queen colonies, but this is unconfirmed for A. asantei.
• Size & Growth:
  • Queen: Approximately 9.86 mm total length ^[2].
  • Worker: 3.47-3.89 mm total length ^[2]. Head width 0.70 mm ^[1].
  • Colony: Unknown. Army ant colonies typically number in the thousands, but specific counts for this species are unconfirmed.
  • Growth: Unknown.
  • Development: Unknown, development time has not been documented for this species. (No studies have tracked brood development in this species.)
• Antkeeping:
  • Temperature: Unconfirmed. Based on tropical Ghana habitat, likely requires warm stable conditions around 24-28°C year-round ^[2].
  • Humidity: Unconfirmed. Coastal scrub and farmland habitats suggest moderate to high humidity around 70-80% ^[2].
  • Diapause: No, tropical species that remains active year-round ^[2].
  • Nesting: Subterranean in nature. In captivity would require a large naturalistic setup with soil and extensive foraging space to accommodate nomadic behavior ^[2].
• Behavior: Column-raiding army ants. They forage in organized branching trails rather than swarms. Workers are blind and rely entirely on chemical trails and touch. They are aggressive predators of other ants but harmless to humans. Their small size means they can escape through minute gaps ^[2][1].
• Common Issues: they only eat other ants, making feeding extremely difficult and ethically problematic for most keepers., they emigrate frequently (move nests) and require huge spaces to accommodate their nomadic lifestyle., tiny size (3.5 mm) means escapes are likely without perfect barriers and fine mesh., they require consistent warmth and high humidity, drying out quickly kills them., colony founding is unstudied, starting a new colony from a queen may be impossible with current knowledge.

Natural History and Raiding Behavior

Aenictus asantei is a true army ant from West Africa. Workers have no eyes and navigate using chemical trails laid by their nestmates ^[2]. They hunt in organized columns, branching lines of workers that spread out to find prey, rather than forming the massive swarms seen in driver ants ^[2]. These columns can be one to four workers wide and may stretch for meters ^[2]. When they find other ants, they attack and carry back the brood and adults to eat ^[2]. They are especially fond of Pheidole ants and have been seen carrying queen pupae, workers, and larvae ^[2]. Colonies are nomadic and frequently move house, with observations of emigrations happening in the morning hours ^[2].

Housing Challenges

Keeping these army ants presents extreme challenges. They nest underground in soil and move frequently, one observation describes a colony emigrating at 9:50 AM with workers carrying prey ^[2]. This nomadic behavior means they need enormous spaces to roam and will quickly outgrow or abandon standard formicaria. Their small size, workers are only 3.5 to 4 mm long, combined with their active foraging means escape prevention must be perfect ^[1][2]. They require a setup that allows for extensive horizontal foraging trails while maintaining high humidity in the nest area, which is difficult to achieve in typical ant farms.

Feeding Requirements

These ants are obligate predators of other ant species. In the wild, they specifically target Pheidole colonies, taking eggs, larvae, pupae, and adults as food ^[2]. This makes them nearly impossible to feed in captivity for ethical and practical reasons. You would need a constant supply of live ant colonies to sustain them. They do not accept standard ant foods like honey water, seeds, or dead insects. This dietary specialization is the primary reason they are considered unkeepable by most antkeepers.

Climate and Environment

Native to coastal Ghana and Nigeria, these ants live in warm, humid conditions. While exact temperature requirements are unstudied, they likely need tropical conditions around 24-28°C year-round with high humidity ^[2]. They do not require hibernation. The nest soil should be kept moist but not waterlogged, similar to the conditions in coastal scrub and farmland where they are found ^[2].

Frequently Asked Questions

References