Pheidole plagiaria

Quick Summary

• Difficulty: Easy
• Origin & Habitat: Native to Southeast Asia, found in Borneo, Brunei, Indonesia, Laos, Malaysia, Myanmar, Philippines, Singapore, Thailand, Vietnam, and southern China ^[1][3]. Indo-Malayan populations inhabit well-developed rainforests and nest in rotting logs and wood fragments, while Indo-Chinese populations occur in forest edges and open lands, nesting in soil ^[1].
• Colony Type: Unconfirmed, no published data on queen number. Typical Pheidole species are often monogyne, but this has not been confirmed for P. plagiaria.
• Size & Growth:
  • Queen: Unknown, no measurements available in literature.
  • Worker: Major: about 4.2 mm, Minor: about 2.1 mm (converted from Smith's '2 lines' and '1 line' measurement) ^[2].
  • Colony: Unknown, no colony size data available, typical Pheidole colonies can reach several hundred workers.
  • Growth: Moderate (inferred from tropical origin and year-round activity)
  • Development: Unknown, no specific data, likely 4-8 weeks at tropical temperatures based on related Pheidole species. (Development is continuous in warm conditions.)
• Antkeeping:
  • Temperature: Keep at 24-28°C. This tropical species needs stable warmth, activity slows below 22°C.
  • Humidity: Keep the nest substrate slightly moist but not waterlogged. Provide a water source in the outworld. Rainforest populations require higher humidity.
  • Diapause: No, as a tropical species, no hibernation needed. Activity continues year-round if kept warm.
  • Nesting: Test tube works for founding. For established colonies use a Y-tong (AAC), plaster, or soil nest. Add pieces of rotting wood or cork bark to mimic natural nesting in decaying wood.
• Behavior: Active foragers that hunt termites and other small arthropods ^[2]. They forage both day and night with no strong time preference ^[4]. Not aggressive to humans, but majors can pinch. Minor workers are very small, so escape prevention must be tight, they can slip through tiny cracks.
• Common Issues: escape prevention is critical due to tiny minors (about 2 mm)., tropical species need stable warmth, activity drops below 22°C., maintain consistent humidity, dry nests can cause brood abandonment., wild colonies may carry parasites that can spread in captivity., major workers develop later, don't worry if first workers are all minors.

Housing and Nest Setup

For a newly caught queen, a test tube setup is reliable: fill a tube a third with water, plug with cotton, and place the queen in darkness. Once the colony has around 20-30 workers, move them to a formicarium. A Y-tong (AAC) or plaster nest with chambers works well, as it holds moisture and provides dark spaces. You can also use a naturalistic setup with soil and pieces of rotting wood or cork bark to mimic their preference for decaying wood ^[1]. Always connect a foraging area (outworld).

Feeding and Diet

In the wild, Pheidole plagiaria hunts termites and other small arthropods ^[2]. In captivity, offer protein 2-3 times per week: fruit flies, small crickets, mealworms, or frozen bloodworms. Provide constant access to carbohydrates like sugar water, honey, or diluted maple syrup. Place food in the outworld and remove leftovers after 24 hours to prevent mold. They are active foragers and will recruit nestmates to food.

Temperature and Humidity

As a tropical species, keep the nest at 24-28°C. Use a heating cable if your room is cooler, and monitor with a digital thermometer. Avoid exceeding 32°C. For humidity, keep the nest substrate slightly moist. Indo-Malayan populations come from rainforests, so they appreciate higher moisture. Provide a water tube for drinking. Avoid placing the setup near air conditioning or cold drafts. ^[1][3]

Colony Development

There is no documented development timeline for this species. Based on related tropical Pheidole, the queen likely lays eggs that develop into workers in 4-8 weeks at warm temperatures. The first workers (nanitics) are usually smaller. Major workers appear later as the colony grows. The colony develops year-round if kept warm, but growth rate depends on feeding frequency and temperature. There is no hibernation season. ^[1]

Behavior and Foraging

Workers are active both day and night, foraging on the ground and in low vegetation ^[4]. They have been observed raiding termite nests and carrying termites away ^[2]. In Indonesia, they dominated bamboo buds, found on 19 out of 27 buds surveyed ^[5]. They use chemical trails to recruit nestmates. When threatened, major workers defend the colony using their large mandibles. They rarely sting humans.

Seasonal Care

This tropical species does not require hibernation. Activity continues year-round as long as temperatures are kept warm (24-28°C). If your room cools down in winter, use a small heater or heating cable to maintain stability. The colony can produce brood continuously under good conditions. ^[1]

Frequently Asked Questions

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References