Polyrhachis constructor

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Native to Sundaland region, including Borneo, Malaysia, Singapore, and Indonesia, found in tropical forests where they build elevated carton nests on shrubs and trees ^[1][2][4].
• Colony Type: Based on Polyrhachis genus patterns, likely single-queen (monogyne) colonies.
• Size & Growth:
  • Queen: 8.85-9.15 mm ^[1]
  • Worker: 7.25-7.55 mm ^[1]
  • Colony: Unknown, maximum colony size not documented for this species.
  • Growth: Moderate
  • Development: 6-10 weeks estimated at optimal temperature (Development time is not species-specific, based on genus-level data.)
• Antkeeping:
  • Temperature: Keep warm and stable, roughly low-to-mid 20s°C, as they are tropical species.
  • Humidity: Keep the nest substrate consistently moist but not waterlogged.
  • Diapause: No, tropical species do not require hibernation.
  • Nesting: Arboreal nesters in the wild, building carton nests between leaves. In captivity, adapt to test tubes or formicaria made of Y-tong, plaster, or 3D-printed materials with vertical space and climbing structures ^[1].
• Behavior: Generally calm and non-aggressive, workers lack a sting and use formic acid spray for defense as typical for Formicinae. Escape risk is moderate due to their size, standard barriers work well, but ensure smooth walls as they are arboreal climbers.
• Common Issues: tropical species may struggle in cool rooms without heating, arboreal nature requires vertical space and climbing structures to prevent stress, wild-caught colonies may have parasites or diseases, carton nest material is difficult to replicate, they adapt to test tubes, queen loss during founding is common, ensure stable conditions

Housing and Nest Setup

Polyrhachis constructor is an arboreal species that naturally builds nests suspended from leaves. In captivity, they adapt well to standard test tube setups, though they appreciate some vertical space and climbing opportunities. Once the colony reaches 20-30 workers, use a formicarium made of Y-tong, plaster, or 3D-printed materials with a connected outworld. Add small branches or twigs to simulate their natural arboreal environment. Avoid fully underground setups ^[1].

Feeding and Diet

Polyrhachis constructor is omnivorous. They accept sugar sources like honey water and protein from small insects such as fruit flies or mealworms. Feed sugar water 2-3 times per week and protein once or twice weekly. Remove uneaten prey after 24 hours to prevent mold ^[1].

Temperature and Humidity

As a tropical species, keep temperatures warm and stable, roughly low-to-mid 20s°C. Use a heating cable on one side of the nest to create a gradient if needed. Humidity should be maintained with consistently moist substrate but not waterlogged, reflecting their arboreal habitat.

Colony Development

Queens are likely claustral, sealing themselves in to survive on stored fat reserves until workers emerge. The first workers (nanitics) are smaller than mature workers. Development from egg to worker is estimated at 6-10 weeks at optimal temperature, based on related Formicinae patterns. Growth is moderate, with colonies potentially reaching several hundred workers over time.

Behavior and Temperament

Workers are relatively calm and not aggressive, preferring to flee rather than defend. They lack a sting and use formic acid spray if threatened, as typical for Formicinae. Their moderate size (7-8 mm) makes escape prevention manageable with standard barriers, but ensure smooth walls due to their climbing nature^[1].

Frequently Asked Questions

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References