Tetramorium decem

Quick Summary

• Difficulty: Medium
• Origin & Habitat: East Africa: Kenya (Arabuko Sokoke Forest), Tanzania (Mkomazi Game Reserve), Zimbabwe (Redbank) ^[1]. Also recorded from Gabon at elevations of 110-375 m in lowland rainforest ^[2]. Prefers arid habitats such as savannah and woodland ^[1].
• Colony Type: Not documented. Colony structure (monogyne or polygyne) is unknown.
• Size & Growth:
  • Queen: Not documented in scientific literature
  • Worker: Size data unavailable. Mesosomal length is 1.02-1.16 mm, but total length has not been recorded ^[1]
  • Colony: Unknown
  • Growth: Moderate
  • Development: 6-10 weeks at 24-28°C (estimated from related Tetramorium species) (Direct development data for Tetramorium decem is not available)
• Antkeeping:
  • Temperature: 24-28°C year-round ^[1]. Use a heating cable on one side of the nest to create a gradient
  • Humidity: Moderate. Keep nest substrate (sandy soil) damp but not waterlogged. Allow partial drying between waterings. Natural habitat is arid, so avoid constant saturation ^[1]
  • Diapause: No, tropical species, active year-round ^[1]
  • Nesting: Y-tong (AAC) nests work well, or a naturalistic setup with sandy soil and rotten wood pieces. In the wild they nest in sandy soil and in rotten wood within leaf litter ^[1][6]
• Behavior: Tetramorium decem is a solitary hunter, foraging alone for termites, springtails, and other small arthropods ^[3][4][5][7]. Workers use area-concentrated searching in productive areas ^[3][4][5]. They are not particularly aggressive toward humans but will defend the nest. As a myrmicine ant, they possess a stinger used primarily for prey capture. Escape prevention should be standard for medium-sized ants, they can exploit small gaps.
• Common Issues: requires live prey, this specialized termite hunter may reject dead protein sources, needs consistent warmth, temperatures below 20°C can slow or stop activity, rare in the hobby, wild-collected colonies may carry parasites, slow colony growth due to solitary hunting strategy, founding behavior is unconfirmed, keepers may struggle to rear founding queens

Housing and Nest Setup

Tetramorium decem can be housed in Y-tong (AAC) nests or naturalistic setups. In the wild they nest in sandy soil and in rotten wood within leaf litter ^[1][6]. A Y-tong nest with chambers of 2-4 mm is suitable, or you can create a naturalistic setup using a sandy soil substrate mixed with a few pieces of rotting wood. Because they are predatory, provide an outworld (foraging area) where you can offer live prey. Keep the nest substrate damp but not waterlogged, a water tube or small reservoir connected to the nest helps maintain humidity. Use standard escape prevention, while not tiny, these ants will exploit any gaps in the setup. Avoid acrylic nests, Y-tong, plaster, or soil nests are better.

Feeding and Diet

This is the most critical aspect of keeping Tetramorium decem. They are specialized predators that hunt termites, springtails (collembolans), and other small arthropods ^[3][4][5][1]. They are NOT scavengers and will typically reject dead protein sources. Offer live prey such as termites (collected from pesticide-free areas), fruit flies, small crickets, or cultured springtails. During the dry season in the wild, these ants concentrate their hunting in moist patches where prey aggregates ^[3][4][5]. You can mimic this by providing a damp area in the outworld where prey naturally congregates. Supplementary sugar water or honey may be accepted but is secondary, live prey is essential for brood development. Feed 2-3 times per week, adjusting based on colony size and consumption.

Temperature and Seasonal Care

As a tropical African species, Tetramorium decem requires warm temperatures year-round. Keep the nest area at 24-28°C ^[1]. Below 20°C, activity slows and brood development may stop. Use a heating cable or mat on one side of the nest to create a gentle gradient, allowing workers to choose their preferred temperature. This species comes from arid habitats (savannah and woodland) ^[1], so they can tolerate some variation in humidity but prefer conditions that are not constantly wet. No hibernation or diapause is required, maintain warm temperatures throughout the year. Monitor colony activity: active foraging indicates good conditions, lethargy suggests temperatures are too low.

Foraging Behavior

Tetramorium decem is a solitary forager, workers hunt alone rather than recruiting nestmates ^[7]. They search through leaf litter and soil, hunting for termites and other small arthropods ^[3][4][5]. They use area-concentrated searching: when a forager finds a productive area with high prey density (often moist patches during dry seasons), it adjusts its path to be more sinuous and slower, concentrating activity there ^[3][4][5]. In captivity, you can observe this behavior as individual workers search the outworld. They do not recruit in the typical ant fashion. Spread prey items around the foraging area rather than piling them in one spot, allowing multiple workers to find prey independently.

Colony Development

Specific colony development data for Tetramorium decem is not documented. Based on typical Tetramorium patterns, expect 6-10 weeks from egg to first worker at 24-28°C ^[1]. The first workers (nanitics) will be smaller than mature workers. As the colony grows, new workers reach full size. Colony growth is moderate, do not expect rapid expansion. Founding behavior is unconfirmed, there is no data on whether queens are claustral or semi-claustral. Once the first workers emerge, the colony enters a slow growth phase. A mature colony likely contains several hundred workers, but this is speculation. Be patient, overfeeding can lead to mold in the nest.

Frequently Asked Questions

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References