Polyrhachis mackayi

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Eastern Australia, from northern Queensland to northern New South Wales. Found along margins of lowland rainforests and woodlands at elevations of 200-600 m ^[1].
• Colony Type: Unconfirmed, colony structure not specifically documented for this species.
• Size & Growth:
  • Queen: 6.3 mm ^[1]
  • Worker: 4.7 mm ^[1]
  • Colony: Size data unavailable for this species.
  • Growth: Moderate, inferred from related Polyrhachis species.
  • Development: Estimated 6-8 weeks based on related Formicinae species at optimal temperature. (Development time is inferred, specific timing for Polyrhachis mackayi has not been documented.)
• Antkeeping:
  • Temperature: Keep warm, around 24-28°C, with a slight gradient, based on their rainforest habitat.
  • Humidity: Keep nest substrate moderately humid but not waterlogged, as they live in rainforest margins ^[1].
  • Diapause: Yes, likely required for 2-3 months at 15-18°C during winter, based on temperate region patterns.
  • Nesting: Arboreal nesters that use silk to bind leaves. Provide a naturalistic setup with climbing structures and materials for silk weaving. Use Y-tong, plaster, or 3D-printed nests with damp substrate ^[2].
• Behavior: Generally calm and non-aggressive. Workers are active foragers that search for honeydew and small prey. Escape risk is moderate due to climbing ability, ensure enclosures have smooth barriers. They spray formic acid for defense but lack a sting.
• Common Issues: arboreal nature requires vertical space and climbing structures, horizontal-only setups may cause stress., silk-weaving behavior may be disrupted without appropriate materials, provide leaves or moss., humidity control is important, too dry causes struggle, too wet causes mold., winter diapause is likely required, skipping it may weaken colonies., limited availability in the antkeeping hobby means established colonies are uncommon.

Nest Preferences and Housing

Polyrhachis mackayi is an arboreal species that builds nests between leaves using silk produced by larvae ^[2]. In captivity, provide a naturalistic setup with live plants, moss, or artificial foliage where they can weave silk nests. Use a tall enclosure with branches or vines for climbing. The outworld should have vertical elements. For standard formicariums, use Y-tong, plaster, or 3D-printed nests with climbing structures and damp substrate ^[2]. Avoid fully horizontal, soil-based setups.

Feeding and Diet

Diet specifics are not documented for this species, but as a Formicinae ant, they likely feed on honeydew and small insects. In captivity, offer sugar water or honey constantly, and supplement with small insects like fruit flies or mealworms 2-3 times per week. Remove uneaten food after 24-48 hours to prevent mold.

Temperature and Seasonal Care

As a species from Australian rainforest margins, keep the nest area warm, around 24-28°C, with a slight gradient. During winter, provide a diapause period at 15-18°C for 2-3 months to mimic natural seasonal cycles. Avoid temperatures below 15°C or above 30°C for extended periods.

Behavior and Colony Dynamics

Polyrhachis mackayi is generally calm and non-aggressive. Workers forage for honeydew and small prey, and the colony nests arboreally using silk ^[2]. They defend by spraying formic acid but lack a sting. Escape risk is moderate due to climbing ability, ensure enclosures have smooth barriers.

Frequently Asked Questions

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References