Polyrhachis smithersi

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Australian Capital Territory, Australia. Found in dry open forest, foraging on Eucalyptus tree trunks at night ^[1][2].
• Colony Type: Colony structure is unconfirmed. Only a few workers and one queen have been collected, all from night foraging on tree trunks.
• Size & Growth:
  • Queen: Up to 7.5 mm ^[1]
  • Worker: Up to 7.4 mm ^[1]
  • Colony: Unknown, no colony data available
  • Growth: Unknown, no colony development data available
  • Development: Unconfirmed, no direct observations. Based on typical Polyrhachis patterns, expect approximately 6-10 weeks at warm temperatures. (No published data on development. Related Polyrhachis species typically take 6-10 weeks from egg to worker at 24-28°C.)
• Antkeeping:
  • Temperature: Temperatures around 24-28°C are likely suitable based on their Australian origin ^[1], but no specific data exists for this species.
  • Humidity: Keep nest substrate relatively dry, as they are from dry open forests ^[1]. Provide a humidity gradient with a small moist area if needed.
  • Diapause: Diapause is likely required based on temperate origin, but unconfirmed for this species. Reduce temperatures to 15-18°C for 2-3 months during winter.
  • Nesting: Provide a vertically-oriented nest for arboreal habits ^[1]. Use Y-tong, plaster, or 3D-printed nests, and include climbing structures like cork bark.
• Behavior: This species is nocturnal and arboreal, foraging at night on tree trunks ^[1]. Workers are moderately sized and likely moderate in aggression when defending the colony. Escape prevention should be moderate due to their size.
• Common Issues: limited species-specific data makes care challenging, nocturnal behavior may require adjusted observation times, diapause requirements are inferred but not confirmed, colony size potential is unknown, wild-caught colonies may be difficult to establish due to limited distribution

Nest Preferences and Housing

Polyrhachis smithersi is an arboreal species that forages on tree trunks in the wild ^[1]. In captivity, provide a vertically-oriented setup that mimics their natural environment. Use Y-tong, plaster, or 3D-printed nests, and include climbing structures like cork bark ^[1]. Ensure good ventilation and avoid overly humid conditions, as they prefer dry open forests ^[1].

Feeding and Diet

Polyrhachis ants are typically omnivorous, feeding on honeydew, nectar, and small insects ^[2]. For this species, offer sugar water or honey as an energy source, and protein like small crickets or mealworms. Feed protein 2-3 times per week with constant sugar access, and remove uneaten prey after 24-48 hours to prevent mold.

Temperature and Seasonal Care

Maintain temperatures around 24-28°C during the active season, based on their Australian origin ^[1]. A temperature gradient allows ants to regulate. During winter, reduce temperatures to 15-18°C for a dormancy period, though this is inferred and not confirmed for this species.

Behavior and Colony Dynamics

This species is nocturnal, with all known specimens collected while foraging on Eucalyptus tree trunks at night ^[1]. Workers are moderately sized and likely use chemical communication for foraging and defense. Based on related species, colonies may be moderate-sized with a single queen, but this is unconfirmed.

Frequently Asked Questions

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References