Pheidole hongkongensis

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Southern China, Northern Vietnam, Thailand, Laos, and Macau. Found in woody gardens, forest edges, limestone forests, secondary forests, and rubber plantations at elevations of 550–680m ^[2][4][3]. Nests in soil, rarely in rotting wood ^[2].
• Colony Type: Unknown – single-queen colonies (monogyny) are typical for most Pheidole species, but this has not been confirmed for P. hongkongensis. The presence of major workers suggests a dimorphic worker caste.
• Size & Growth:
  • Queen: Estimated ~4–6mm based on typical Pheidole queens (no direct measurements available)
  • Worker: Body length not provided in literature. Head length: majors ~1mm, minors ~0.5mm ^[2], estimated total body length majors ~3–4mm, minors ~2–3mm.
  • Colony: Estimated several hundred to a few thousand workers based on genus patterns
  • Growth: Moderate (inferred from genus)
  • Development: Estimated 6–8 weeks at 22–26°C based on typical Pheidole development (no species-specific data) (Development time is inferred from the genus, specific data for this species is not available.)
• Antkeeping:
  • Temperature: Keep at 22–26°C. A heating cable on one side of the nest creates a gradient. Based on their subtropical range (southern China, Vietnam, Thailand) and collection sites at 550–680m elevation ^[4].
  • Humidity: Keep the nest substrate consistently moist but not waterlogged. They inhabit soil in woody gardens and forest edges, suggesting a need for damp conditions without flooding. Provide a water source via a test tube or water feeder.
  • Diapause: Likely no true diapause given their tropical/subtropical origin. Activity may slow during cooler months in temperate climates, if so, reduce feeding and keep slightly cooler (18–20°C) but do not allow temperatures below 15°C for extended periods.
  • Nesting: Soil-nesting species. Use a Y-tong (AAC) nest, plaster nest, or a naturalistic setup with moist soil. Ensure chambers are narrow to suit their tiny workers. Test tubes with water and a dark chamber work well for founding.
• Behavior: Typical Pheidole behavior: minors handle foraging, brood care, and nest maintenance, majors defend the colony and process larger food items. They are not aggressive toward humans but may bite if handled – the bite is negligible due to their small size. Minors are very small (~2–3mm body length), so escape risk is high, use Fluon or oil barriers on all exposed edges. They forage actively and form trails once food is located.
• Common Issues: substrate drying out can kill the colony – monitor moisture levels regularly, tiny minor workers can slip through even small gaps – ensure all connections are tight and use barrier fluids, founding behavior is undocumented – if using a claustral setup, allow the queen to remain undisturbed for several weeks, be patient as first workers may take 6–8 weeks, major workers may not appear until the colony reaches several dozen to a hundred workers

Housing and Nest Setup

Pheidole hongkongensis nests naturally in soil, so a setup with a moist substrate is ideal. Use a Y-tong (AAC) nest or plaster nest with built-in moisture chambers. The nest chambers should be narrow – the minor workers are only about 2–3mm body length, and even smaller in head size ^[2]. Connect the nest to an outworld via tubing. A test tube setup with a water reservoir at the back works well for starting colonies, ensure the tube is dark and the queen can seal herself in. Because of their small size, all junctions must be airtight, and apply Fluon or a PTFE-based barrier around the outworld rim. Place the nest in a location with stable temperatures (22–26°C) and away from direct sunlight.

Feeding and Diet

The natural diet of P. hongkongensis is not specifically documented, but like other Pheidole, they are likely omnivorous. In the wild they probably feed on small insects, seeds, and honeydew. In captivity, offer protein sources such as small crickets, fruit flies, or mealworm pieces twice a week. Sugar water or honey water should be available continuously in a small dish or via a cotton ball. Remove uneaten prey after 24–48 hours to prevent mold. A varied diet supports brood development and helps produce major workers. Their small size means food items must be cut into tiny pieces or offered as liquids.

Temperature and Seasonal Care

Maintain the nest at 22–26°C for optimal activity and development. This species originates from subtropical to tropical regions (southern China, Vietnam, Thailand, Laos) where temperatures are warm year-round ^[2][4][3]. A heating cable on one side of the nest allows the colony to thermoregulate. In temperate climates during winter, you can reduce heat to around 18–20°C and reduce feeding – true hibernation is unlikely but activity may slow. Avoid dropping below 15°C for more than a few days. The species has been collected at elevations up to 680m, indicating some tolerance for cooler nights ^[4].

Colony Development

Colony founding behavior for this species is not documented, but most Pheidole queens found colonies claustrally, feeding the first brood from stored fat reserves. Expect the first workers (nanitics) to emerge about 6–8 weeks after egg laying, assuming warm temperatures. These early workers are smaller than typical minors. Major workers (soldiers) usually appear once the colony has several dozen to a hundred workers and can help process larger food. Colony growth is moderate, under good conditions, expect 50–100 workers within a few months and several hundred after a year. Patience is key during founding, as the queen is sensitive to disturbance.

Behavior and Observation

This species exhibits a typical Pheidole division of labor: the small minors do the majority of foraging, brood care, and nest maintenance, while the larger majors defend the nest and help dismember large prey. Workers are active foragers and will quickly find food sources in the outworld, establishing a well-marked trail. They are not aggressive toward keepers but may give a mild pinch if handled. Because the minors are extremely small, they can easily escape through any gap larger than about 1mm – use Fluon or oil on all barriers. They are tolerant of brief disturbances but prefer a dark, quiet nest area.

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References