Temnothorax melas

Quick Summary

• Difficulty: Easy
• Origin & Habitat: Corsica, France, endemic to this Mediterranean island ^[1][2]. They inhabit the island's rocky Mediterranean habitats, typically nesting under stones or in rock crevices in warm, sheltered locations ^[5].
• Colony Type: Obligatorily monogyne, single queen colonies only ^[3].
• Size & Growth:
  • Queen: ~4-6 mm (inferred from Temnothorax genus patterns)
  • Worker: ~2-4 mm (inferred from Temnothorax genus patterns) ^[1]
  • Colony: Estimated up to 200 workers at maturity
  • Growth: Moderate
  • Development: 6-10 weeks at optimal temperature (estimated from genus patterns) (Development time is typical for Mediterranean Temnothorax species. First workers (nanitics) will be smaller than mature workers.)
• Antkeeping:
  • Temperature: Temperature needs are not well studied. Start around 20-24°C and observe colony activity. A gentle heating gradient can be helpful if your room is cooler.
  • Humidity: Provide a moisture gradient in the nest. They come from dry Mediterranean habitats, so keep the nest substrate slightly dry with a small moist area. Avoid waterlogging.
  • Diapause: Yes, based on temperate Mediterranean climate, a winter rest is likely needed. Provide a cooling period of 8-12 weeks at 10-15°C during winter. Skipping it may weaken the queen.
  • Nesting: Y-tong (AAC) nests or naturalistic setups with flat stones work well. Ensure chambers are small (2-3 mm height) to match their tiny size.
• Behavior: Peaceful and non-aggressive. Workers are active foragers. Their tiny size makes escape prevention critical. They possess a modified stinger used for smearing venom rather than piercing, so they are harmless to keepers. Swarming occurs in the evening ^[4].
• Common Issues: escape prevention is critical due to their tiny size, they can squeeze through gaps that seem impossible, colonies are slow to establish initially and beginners may lose patience during founding, winter diapause is required for long-term health, skipping it weakens the queen, test tube setups can flood if water reservoirs are too large for such small ants

Housing and Nest Setup

Because Temnothorax melas is tiny, your nest must have appropriately scaled chambers and tunnels. Y-tong (AAC) nests work excellently, the narrow chambers match their small size and the material provides good humidity control. Naturalistic setups with flat stones, slate, or cork bark also work well. These ants nest in rock crevices in the wild, so they prefer tight, enclosed spaces rather than open areas. Aim for chambers 3-5 mm wide and 2-3 mm tall. Excellent escape prevention is essential, use fluon or fine mesh on all openings, as they can escape through gaps smaller than 0.5 mm.

Feeding and Diet

Like other Temnothorax, T. melas is omnivorous. They readily accept small insects like fruit flies, pinhead crickets, and small mealworms. Sugar sources are important too, offer diluted honey, sugar water, or honeydew occasionally. In the wild, they forage for small prey and collect honeydew from aphids. Feed small prey 2-3 times per week for established colonies and keep a sugar source available always. Remove uneaten prey after 24 hours to prevent mold. Prey items should be appropriately sized, nothing larger than their head.

Temperature and Seasonal Care

No specific temperature data exists for this species. Based on their Mediterranean origin, keep the colony around 20-24°C for active growth. In summer, room temperature is often sufficient. If you use a heating cable, place it on one side to create a gradient, never heat the entire nest uniformly. Winter cooling is likely needed: provide 8-12 weeks at 10-15°C. You can do this in an unheated room, garage, or refrigerator (not freezer). Reduce feeding during this period and keep the nest slightly drier. Skipping diapause may weaken the queen and shorten colony lifespan.

Colony Founding

Founding behavior has not been studied for this species. In many Temnothorax, queens seal themselves in a chamber and rely on stored reserves (claustral founding), but this is not confirmed for T. melas. If you catch a queen, provide a small test tube setup with a water reservoir and an initial drop of sugar water. Do not disturb her, she may appear inactive for weeks. Expect first workers (nanitics) in about 6-10 weeks if conditions are right. Once workers emerge, start feeding tiny prey and sugar water. Never combine queens, as this species is obligatorily monogyne ^[3].

Behavior and Temperament

Temnothorax melas is a peaceful species that poses no threat to keepers. Workers are small, dark, and active, they forage, care for brood, and maintain the nest. They are not aggressive and do not have functional stingers. Their main defense is fleeing or hiding, using a modified stinger to smear venom rather than sting. They do not form supercolonies or show territorial behavior. Workers communicate via chemical signals and use tandem running to recruit nestmates to food sources. They are most active during evening hours, matching their swarming time ^[4]. The biggest husbandry challenge is their tiny size, without proper barriers, they will escape.

Frequently Asked Questions

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References