Myrmica ademonia

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Southern Russian Far East (Khabarovsk, Primorye, Kuril Islands) and Korean Peninsula. In Russia, it inhabits mixed and deciduous forests, nesting primarily in decayed wood and rarely in soil. In Korea, it lives in mixed forests (oak, maple, elm, pine, fir) at altitudes between 600-1500m, though it has also been found in wetter areas at lower elevations around 200m ^[1][2].
• Colony Type: Colony structure is unconfirmed for this specific species.
• Size & Growth:
  • Queen: Size data unavailable, no specific measurements exist for this species. Based on typical Myrmica genus patterns, queens are likely in the 5-7mm range.
  • Worker: Size data unavailable, no specific measurements exist for this species. Based on typical Myrmica genus patterns, workers are likely in the 4-6mm range.
  • Colony: Colony size is not documented for this specific species. Myrmica colonies typically reach several hundred to a few thousand workers at maturity.
  • Growth: Moderate, typical for Myrmica species
  • Development: Development time is unconfirmed for this species. Based on typical Myrmica genus patterns, expect approximately 6-10 weeks from egg to worker emergence. (Development time depends on temperature, cooler temperatures slow development significantly.)
• Antkeeping:
  • Temperature: Keep around 18-22°C. This species prefers cooler conditions typical of its northern forest habitat. Avoid overheating, temperatures above 25°C may be stressful. A gentle temperature gradient allows workers to choose their preferred zone.
  • Humidity: High humidity is essential, these are damp forest ants. Keep the nest substrate consistently moist but not waterlogged. The nesting chamber should feel damp to the touch. Provide a water reservoir in test tube setups and mist the outworld regularly.
  • Diapause: Yes, Myrmica species require a winter dormancy period. Keep colonies at 5-10°C for 3-4 months (roughly October to February in the Northern Hemisphere) to simulate natural seasonal cycles. Reduce feeding and keep the colony slightly cooler during this period.
  • Nesting: Decaying wood specialist, prefers nesting in moist, rotting wood or wood-based substrates. In captivity, a Y-tong (AAC) nest with wood inserts or a naturalistic setup with damp wood pieces works well. Test tubes with cotton water reservoirs are suitable for founding colonies. Avoid dry, sandy substrates, this species avoids the coarse soil and stone habitats that other Myrmica species prefer.
• Behavior: Workers are moderately active and forage actively in the outworld. Like most Myrmica species, they have a functional stinger and can deliver a mild sting if provoked, though they are not particularly aggressive. They use chemical recruitment to alert nestmates to food sources. Escape risk is moderate, these ants are not strong climbers but can climb smooth surfaces. Use standard barrier methods (fluon on rim edges). Workers are reddish-brown and may be confused with other Myrmica species if not examined closely.
• Common Issues: dry nesting material is the most common killer, these ants need constant moisture., overheating causes rapid colony decline, keep away from direct heat sources and warm rooms., colonies often fail during first hibernation if not properly prepared or if temperature fluctuates wildly., wild-caught colonies may harbor parasites that can devastate captive colonies., their preference for wood nesting means standard test tube setups may need modification with damp wood inserts.

Nest Preferences and Housing

Myrmica ademonia is a wood-nesting specialist. In the wild, it almost exclusively nests in decaying wood, fallen logs, rotting branches, and similar damp, soft wood substrates. This is a key difference from species like Myrmica sulcinodis that nest directly in soil or under stones. For captive care, provide a nest environment that mimics this wood-preference. A Y-tong (AAC) formicarium with wood inserts or a naturalistic setup with pieces of damp, rotting wood works best. Test tube setups can work for founding colonies if you add a small piece of damp wood or bark for the queen to adopt. The nesting area must stay consistently moist, these ants will abandon chambers that dry out. Avoid completely dry formicaria or sandy soil nests that work for other species ^[2].

Temperature and Seasonal Care

This species prefers cooler temperatures than many commonly kept ants. Keep the nest area between 18-22°C, this mimics the cool forest floor conditions of its natural habitat in the Russian Far East and Korean Peninsula. Room temperature is often suitable, but avoid placing colonies near heating vents, radiators, or in warm rooms. Overheating is a common killer of Myrmica ademonia colonies. During summer months, ensure good ventilation and consider moving the colony to a cooler location if room temperatures exceed 25°C. A heating cable on only one side of the nest can create a useful gradient, allowing workers to move between warmer and cooler areas. In winter, provide a proper diapause (winter rest) at 5-10°C for 3-4 months, this is essential for colony health and reproduction.

Feeding and Diet

Like other Myrmica species, Myrmica ademonia is omnivorous with a preference for protein-rich foods. Feed a varied diet including small insects (fruit flies, small crickets, mealworms), and offer sugar sources such as honey water or sugar water regularly. In the wild, they forage for small invertebrates and likely tend aphids for honeydew. Feed protein sources 2-3 times per week, and keep a constant sugar water supply. Remove uneaten prey after 24-48 hours to prevent mold. Workers will recruit nestmates to larger food finds using chemical trails. A varied diet supports healthy brood development and colony growth.

Humidity Requirements

High humidity is critical for this species, they are forest-floor ants from damp environments. The nest substrate should feel consistently moist but never waterlogged. In test tube setups, use a water reservoir with cotton wick that keeps the chamber humid without flooding. In formicaria, mist the nest area regularly and consider adding a water reservoir. The outworld should also have some moisture, occasional misting helps. However, avoid stagnant, overly wet conditions that promote mold. The key is consistent dampness: dry nesting material causes colony abandonment or death faster than almost any other factor. Monitor moisture daily and rehydrate before the substrate surface dries out.

Hibernation and Winter Care

Myrmica ademonia requires a winter dormancy period to maintain healthy colony cycles. This diapause mimics the harsh winters of its native range in the Russian Far East and Korean Peninsula. From roughly October through February (3-4 months), reduce the colony temperature to 5-10°C. This can be achieved by moving the colony to a cool basement, unheated garage, or refrigerator (for small setups). During hibernation, reduce feeding significantly, the colony will be mostly inactive. Do not feed during the deepest winter rest. Ensure the nesting material remains slightly moist throughout hibernation, check periodically and add a few drops of water if needed. Proper hibernation promotes queen fertility and helps synchronize the colony's annual cycle with natural rhythms.

Frequently Asked Questions

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References