Temnothorax duloticus

Temnothorax duloticus

Temnothorax duloticus is a small, yellowish-brown slave-making ant native to the eastern United States and southern Ontario, Canada. Workers measure 2.4-2.6mm with a distinctive 11-segmented antenna and a prominent ventral tooth on the petiole ^[1]. The species is one of three North American slave-makers in the Temnothorax genus and shows a close phylogenetic relationship to its host T. curvispinosus, suggesting relatively recent evolutionary origin ^[2]. Colonies are tiny, typically under 70 slave-maker workers accompanied by roughly three times as many enslaved host workers ^[1]. This species nests primarily in acorns, hollow twigs, and small cavities in dead wood on the ground ^[1].

Quick Summary

• Difficulty: Expert
• Origin & Habitat: Eastern United States (Ohio, Michigan, Illinois, Indiana) and Ontario, Canada. Found in dry oak woods, gentle slopes of fairly open woods with shallow sandstone soil ^[1][3].
• Colony Type: Obligate slave-maker, requires host Temnothorax species to survive. Single-queen colonies (monogyne) ^[3].
  • Colony: Monogyne
  • Queen: Parasitic
  • Special: Slave-making
• Size & Growth:
  • Queen: 3.25mm ^[4]
  • Worker: 2.4-2.6mm ^[1]
  • Colony: Up to 70 workers plus host slaves (approximately 3:1 ratio) ^[1]
  • Growth: Slow, small colony size limits growth potential
  • Development: Unknown, likely 6-8 weeks based on related Temnothorax species (Development not directly studied, small colony size suggests slower overall growth compared to free-living Temnothorax)
• Antkeeping:
  • Temperature: Keep at room temperature (20-24°C). No specific requirements documented, infer from host species preferences ^[1].
  • Humidity: Moderate, typical for eastern US forest floor species. Keep nest substrate slightly moist but not wet ^[1].
  • Diapause: Yes, likely requires winter dormancy like other temperate Temnothorax. Provide 4-6 weeks at 5-10°C ^[3].
  • Nesting: Acorn nests, Y-tong nests with small chambers, or naturalistic setups with hollow twigs. Very small chambers scaled to their tiny size ^[1].
• Behavior: Highly aggressive raider that conducts organized slave raids on host colonies. Workers are physically specialized for combat, they kill host defenders by stinging them before capturing pupae ^[5]. Without slaves, workers are nearly helpless, they cannot properly care for brood, forage for food, or maintain the nest ^[6]. When slaves are present, slave-maker workers are largely inactive and delegate all colony maintenance to enslaved workers ^[6]. This species conducts processions during raids, moving in coordinated lines ^[2]. Escape risk is moderate, small ants but not as prone to escaping as some Temnothorax.
• Common Issues: This species CANNOT be kept without a host colony, slave-makers cannot survive alone without enslaved Temnothorax workers to care for them, Maintaining both slavemaker and host colonies doubles the complexity and failure risk of regular ant keeping, Slave-maker colonies are extremely fragile, if the host colony dies, the slavemakers will follow within weeks, Finding legal host species (T. curvispinosus, T. longispinosus, T. ambiguus) may be difficult depending on your location, These ants are rare in the hobby and may not be legal to keep in all jurisdictions

Understanding Slave-Making Ants

Temnothorax duloticus is an OBLIGATE slavemaker, this is perhaps the most important thing to understand before considering this species. Unlike typical ants that build their own colonies, slave-makers survive by invading colonies of other ant species and stealing their pupae. The stolen pupae emerge as adult workers within the slavemaker nest and become involuntary workers that feed, clean, and care for the slavemaker colony as if they were in their own nest ^[6]. This is not optional behavior, T. duloticus workers are severely impaired without slaves. When slaves are removed, slavemaker workers attempt to perform normal tasks but do so poorly: they feed larvae at wrong intervals, care inadequately for brood, move nest materials incorrectly, and cannot properly collect and share food ^[6]. Without slaves, they will not even search for dead insects or solid food, ignoring food entirely ^[6]. This species is considered to have reached only a 'primitive' stage of slave exploitation compared to more advanced slavemakers like Harpagoxenus ^[7]. The species appears to be of relatively recent evolutionary origin based on genetic analysis, closely related to its host T. curvispinosus ^[2].

Host Species Requirements

You MUST obtain and maintain a host colony to keep T. duloticus successfully. The preferred hosts are Temnothorax curvispinosus, Temnothorax longispinosus, and occasionally Temnothorax ambiguus ^[1][2]. Of these, T. curvispinosus appears to be the preferred host in the wild ^[5]. This means you are essentially committing to keeping TWO ant colonies, the slavemaker colony and at least one host colony. The host colony must be established and healthy before introducing slavemakers. In the wild, slavemaker colonies are always found living alongside host colonies, typically in a ratio of about 1:3 (one slavemaker worker for every three slave workers) ^[1]. When you collect or obtain a slavemaker colony, you must also collect the associated host colony. If you separate them, both colonies will likely fail. This complexity makes this species suitable ONLY for very experienced antkeepers who are prepared to maintain multiple colonies simultaneously.

Feeding and Nutrition

In the wild, T. duloticus workers are largely fed by their enslaved hosts. The slave workers forage for food, collect honeydew, and capture small insects, then share everything with the slavemakers ^[6]. In captivity, you will primarily feed the HOST colony, and the slaves will bring food back to share with the slavemakers. Feed the host colony a standard ant diet: sugar water or honey, small live insects like fruit flies or pinhead crickets, and occasional protein sources ^[6]. The slavemaker workers will accept food brought to them by slaves but will largely ignore food presented directly to them if slaves are present ^[6]. Without slaves, you would need to feed slavemakers directly, but they perform poorly at self-feeding. The key is maintaining a healthy host colony that will feed both itself and the slavemakers.

Raiding Behavior

One of the most fascinating aspects of T. duloticus is its raiding behavior. Unlike some slavemakers that use stealth, T. duloticus is a fierce and aggressive raider. Workers will actively attack host colonies, stinging opposing workers to kill them before capturing pupae ^[5]. This results in local eradication of host colonies when raids are successful ^[5]. They conduct 'processions' during raids, moving in coordinated lines rather than scattered groups ^[2]. This aggressive raiding behavior is why they are sometimes called 'fierce slavemakers' ^[5]. In captivity, you should NEVER introduce slavemakers to a host colony you want to preserve, they will destroy it. The slavemaker colony should be kept completely SEPARATE from any host colonies you want to maintain for breeding. If you want to expand your slavemaker colony, you would need to raid additional host colonies (which is neither ethical nor practical in captivity). Instead, slavemaker colonies should be maintained as-is with their original slaves.

Legal and Ethical Considerations

Before obtaining T. duloticus, you must research the legal status of this species in your area. Slave-making ants may be regulated or prohibited in some jurisdictions due to their parasitic nature and potential ecological impact if released. Additionally, you must consider whether it is ethical to maintain a species that inherently depends on exploiting another species. The host species (T. curvispinosus, T. longispinosus) are common in the eastern United States and are not protected, but you should still obtain colonies ethically, only collect from areas where populations are healthy, and never collect more than a small portion of any wild colony. This species is RARE in the hobby and should only be kept by experienced antkeepers who fully understand the biological requirements and ethical implications. ^[1][3]

Frequently Asked Questions

References