Scientific illustration of Polyrhachis thompsoni ant - showing key identification features including head, thorax, and gaster.

Polyrhachis thompsoni

Monogynous Non-Parasitic Queen No Gamergate
Sci. Name
Polyrhachis thompsoni
Subgenus
Myrmhopla
Tribe
Camponotini
Subfamily
Formicinae
Author
Bingham, 1903
Distribution
Found in 1 countries
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Introduction

Polyrhachis thompsoni is a spiny ant species belonging to the subgenus Myrmhopla, native to the Himalayan region and Southeast Asia. Workers are medium-sized ants with characteristic spines on their thorax. They are found across India (Himachal Pradesh, Sikkim, Tripura), Nepal, Bhutan, Myanmar, and southern China (Yunnan), typically at elevations between 400-1600 meters . This species inhabits cool broadleaved forests and agricultural areas, suggesting temperate to subtropical conditions at moderate elevations. This species lacks a functional sting but can spray formic acid as a defense mechanism, typical of Formicinae ants.

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Status by country, from Kass et al. 2022 & Wong et al. 2023

Native Invasive Introduced (indoor) Intercepted Unknown
Data Sources
Year Range 2000 - 2026

Quick Summary

  • Difficulty: Medium
  • Origin & Habitat: Himalayan region and Southeast Asia, found in India (Himachal Pradesh, Sikkim, Tripura), Nepal (Makawanpur district at 400m), Bhutan (Tsirang at 1400-1600m), Myanmar, and China (Yunnan). Inhabits cool broadleaved forests and agricultural land at elevations of 400-1600 meters [1][2][3].
  • Colony Type: Based on typical Polyrhachis patterns, likely monogyne (single queen colonies). Colony structure is inferred, not directly studied.
  • Size & Growth:
    • Queen: Size data unavailable, inferred from Polyrhachis genus
    • Worker: Size data unavailable, inferred from Polyrhachis genus
    • Colony: Unknown
    • Growth: Moderate
    • Development: Estimated 6-10 weeks at optimal temperature, based on typical Formicinae development (Development time is temperature-dependent, warmer conditions may accelerate growth.)
  • Antkeeping:
    • Temperature: Keep at moderate temperatures, roughly 22-26°C, based on their elevation range [1][2][3].
    • Humidity: Keep nest substrate consistently moist but not waterlogged, as they inhabit cool broadleaved forests [3].
    • Diapause: Yes, based on temperate distribution [1][2][3].
    • Nesting: Semi-arboreal nesting preferences. Provide vertical space and climbing structures [4].
  • Behavior: Generally calm and non-aggressive for a Formicinae ant [4]. Workers are active foragers with moderate escape risk due to their size.
  • Common Issues: lack of specific care data requires starting with moderate conditions and adjusting based on colony behavior, semi-arboreal nature means they need vertical space to prevent stress and escape, winter dormancy requirements are inferred, monitor for seasonal slowdowns to avoid colony decline, wild-caught colonies may be stressed from collection and require careful acclimation, diet acceptance is not documented, provide varied food to ensure nutrition and prevent starvation

Natural History and Distribution

Polyrhachis thompsoni is distributed across the Himalayan foothills and Southeast Asia, with confirmed records from India (Himachal Pradesh, Sikkim, Tripura), Nepal, Bhutan, Myanmar, and southern China (Yunnan province) [1][5][2]. The species was originally described by Bingham in 1903 from Myanmar specimens. Collection data shows they inhabit elevations from 400 meters in Nepal to 1600 meters in Bhutan, typically in cool broadleaved forests and agricultural land [3]. This elevation range suggests they prefer temperate conditions rather than tropical heat.

Housing and Nest Setup

Based on their semi-arboreal nature and typical Polyrhachis behavior, these ants do best in setups that allow for vertical climbing space. Use Y-tong, plaster, or soil nests with appropriately sized chambers. Provide a foraging area with climbing surfaces like branches or cork bark. Escape prevention should be moderate, they are not tiny, but standard barriers are recommended [4].

Feeding and Diet

Like most Formicinae ants, Polyrhachis thompsoni likely has an omnivorous diet. Offer sugar water or honey as a constant energy source, plus small protein items like fruit flies or mealworms. Start with these basics and observe what your colony accepts [4].

Temperature and Seasonal Care

Based on their collection at 400-1600m elevation, aim for moderate temperatures around 22-26°C, with a slight gradient for self-regulation [1][2][3]. Given their temperate distribution, they likely require winter diapause, reduce temperature to 15-18°C for 2-3 months during colder months.

Colony Development

Founding behavior is unconfirmed. Development from egg to worker is estimated at 6-10 weeks at optimal temperature, based on typical Formicinae patterns. Colony growth is moderate, with steady expansion once established.

Frequently Asked Questions

How long does it take for Polyrhachis thompsoni to produce first workers?

Based on typical Formicinae development, expect first workers in about 6-10 weeks after the queen lays eggs, assuming optimal temperature around 24-26°C. This is an estimate since specific data is unavailable.

What temperature do Polyrhachis thompsoni ants need?

Keep them at moderate temperatures, roughly 22-26°C, based on their elevation range in the Himalayan region [1][2][3].

Do Polyrhachis thompsoni ants need hibernation?

Yes, based on their temperate distribution, they likely require a winter rest period. Reduce temperature to 15-18°C for 2-3 months during winter [1][2][3].

What do Polyrhachis thompsoni ants eat?

They are omnivorous like most Formicinae. Offer sugar water or honey plus small protein items like fruit flies or mealworms [4].

Are Polyrhachis thompsoni good for beginners?

This species is rated as Medium difficulty. There is limited captive care information, so beginners should be comfortable with basic antkeeping and prepared to adjust conditions based on colony behavior.

How big do Polyrhachis thompsoni colonies get?

Colony size is not well documented, but growth is moderate. Expect steady expansion over the first year once established.

Can I keep multiple Polyrhachis thompsoni queens together?

This species is likely monogyne based on typical Polyrhachis patterns. Combining unrelated queens is not recommended as they would likely fight. House founding queens alone until colony establishment.

What type of nest is best for Polyrhachis thompsoni?

They do well in Y-tong, plaster, or soil nests with vertical climbing structures. Provide some vertical space since they are semi-arboreal [4].

Where is Polyrhachis thompsoni found in the wild?

They are native to the Himalayan region, specifically India (Himachal Pradesh, Sikkim, Tripura), Nepal, Bhutan, Myanmar, and southern China (Yunnan). They live at elevations of 400-1600 meters in cool broadleaved forests and agricultural areas [1][2][3].

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References

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