Strumigenys rehi

Quick Summary

• Difficulty: Expert
• Origin & Habitat: Brazil and Colombia in the Neotropical region. Originally collected from orchid plants, indicating an arboreal habitat ^[2].
• Colony Type: Unknown, based on Strumigenys genus patterns, likely single-queen colonies.
• Size & Growth:
  • Queen: Unknown for this species.
  • Worker: 3.3-3.7mm ^[1]
  • Colony: Unknown.
  • Growth: Unknown, but likely slow due to specialized diet.
  • Development: Unknown for this species, estimated 8-12 weeks based on related myrmicine species. (No direct development data available for S. rehi.)
• Antkeeping:
  • Temperature: Tropical species from Brazil/Colombia, maintain 24-28°C.
  • Humidity: Keep substrate moist but not waterlogged, high ambient humidity is beneficial. No reliable literature data on exact humidity levels.
  • Diapause: No, tropical species does not require diapause.
  • Nesting: Arboreal nesters, prefer preformed cavities. Use Y-tong or plaster nests with small chambers.
• Behavior: Strumigenys rehi is a calm, non-aggressive ant that poses no threat to keepers. Their tiny size means they are harmless to humans. Workers are active hunters that use their specialized mandibles to capture small live prey. They are excellent escape artists due to their small size, fine mesh barriers are essential. They rely primarily on protein prey and are not attracted to sugar sources.
• Common Issues: tiny size requires fine mesh barriers for escape prevention., specialized diet needs live springtails, establishing a thriving culture is critical., high humidity may cause mold if ventilation is inadequate., growth is likely slow, patience required., difficulty sourcing springtails can lead to starvation.

Housing and Nest Setup

Strumigenys rehi requires careful housing due to its tiny worker size of just 3.3-3.7mm ^[1]. Use a Y-tong or plaster nest with chambers appropriately scaled to their small size. The chambers should be tight and snug, larger open spaces can stress these tiny ants. Because they were found in orchid plants and have large eyes indicating arboreal habits, they likely prefer nesting in preformed cavities rather than digging in soil ^[2]. A small outworld area connected to the nest allows for hunting territory. Escape prevention is critical, use fine mesh barriers and ensure all connections are sealed. Their tiny size means they can slip through surprisingly small gaps.

Feeding and Diet

Strumigenys rehi is a specialized predator that requires live prey. In the wild, these ants hunt springtails (Collembola) and other tiny arthropods using their trap-jaw mandibles ^[2]. In captivity, you must establish a reliable springtail culture, this is the primary food source. Other tiny live prey like fruit fly larvae, booklice, and dust mites may be accepted, but springtails should form the bulk of their diet. Do not rely on sugar sources or dead protein, these ants are obligate predators. Feed every 2-3 days, offering small amounts of live prey. Remove uneaten prey after 24 hours to prevent mold. Establishing and maintaining a thriving springtail culture is the single biggest challenge in keeping this species.

Temperature and Care

As a tropical species from Brazil and Colombia, Strumigenys rehi needs warm temperatures. Keep the nest area at 24-28°C, this range supports normal activity and brood development. A slight temperature gradient allows the colony to self-regulate. Use a heating cable or mat on one side of the nest if your room temperature is below this range. Place heating on top of the nest, not underneath, to avoid evaporating moisture too quickly. These ants need high humidity to match their Amazonian origin. Monitor condensation levels in the nest, some condensation is normal and beneficial, but excessive moisture leads to mold. Use adequate ventilation to prevent stagnant air while maintaining humidity.

Behavior and Temperament

Strumigenys rehi is a calm, non-aggressive ant that poses no threat to keepers. Their small size means they are harmless to humans. Workers are active hunters that will search out and capture small live prey. They do not form large colonies, expect modest numbers of workers even in established colonies. The species shows typical Strumigenys hunting behavior where workers use their specialized mandibles to quickly seize prey items. They are not known for escape attempts beyond what their tiny size naturally permits, but excellent barrier maintenance is still essential.

Frequently Asked Questions

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References