Carebara hostilis

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Port Natal (Durban), KwaZulu-Natal, South Africa, subtropical coastal region ^[1]. This area has warm temperatures year-round with moderate humidity, typical of coastal forest and savanna habitats.
• Colony Type: Colony structure is unconfirmed for this specific species.
• Size & Growth:
  • Queen: Size data unavailable, inferred from Carebara genus patterns (~5-8mm)
  • Worker: Size data unavailable, inferred from Carebara genus patterns (1-3mm for minor workers, larger for majors)
  • Colony: Unknown for this species
  • Growth: Unknown
  • Development: Unknown, likely several weeks to months based on typical Myrmicinae patterns (Development is temperature-dependent.)
• Antkeeping:
  • Temperature: Keep warm, roughly 24-28°C, adjust based on colony behavior and health.
  • Humidity: Maintain moderate humidity. Keep the nest substrate slightly moist but not waterlogged.
  • Diapause: Unlikely required, their native habitat in coastal South Africa does not experience cold winters.
  • Nesting: Use a test tube setup initially, transitioning to a small Y-tong (AAC) or plaster nest with tight chambers scaled to their tiny size. They prefer dark, enclosed spaces.
• Behavior: Workers are tiny but can be defensive when their nest is disturbed. Major workers serve as soldiers and will defend against threats. They are likely predatory or omnivorous, accepting small insects and sugar sources. Escape prevention is critical due to their very small size, use fine mesh barriers and ensure all openings are sealed.
• Common Issues: escape prevention is critical, their tiny size means they can squeeze through the smallest gaps, colonies may be slow to establish initially, patience is needed during founding, overheating is a risk, keep temperatures within safe range and avoid direct heat sources, small colony size during founding makes them vulnerable, avoid disturbing the queen during founding, predatory nature means they need regular protein input, sugar alone is insufficient

Housing and Nest Setup

Carebara hostilis requires careful housing due to their tiny size. Start with a standard test tube setup, fill one tube with water and plug the other end with cotton, providing a humid chamber for the founding queen. The tube should be placed in a dark, quiet location away from vibrations. Once the colony reaches 20-30 workers, you can transition to a small formicarium. Y-tong (AAC) nests work well because they provide tight chambers scaled to small ants. Alternatively, a small plaster nest with narrow tunnels suits them better than larger setups. Always use excellent escape prevention, these ants can squeeze through gaps that seem impossible. Apply fluon to the edges of any lid and use fine mesh for any ventilation holes.

Feeding and Diet

Carebara species are typically omnivorous with a strong predatory instinct. Feed small live prey such as fruit flies, pinhead crickets, and small mealworms. You can also offer protein-rich foods like boiled egg, tuna, or cat food in tiny portions. Sugar sources are important too, offer a drop of sugar water or honey every few days. Fresh water should always be available. Feed small amounts every 2-3 days and remove any uneaten food to prevent mold. During founding, the queen typically does not need food, she survives on her stored fat reserves. Once workers emerge, begin offering tiny amounts of food.

Temperature and Seasonal Care

Maintain temperatures between 24-28°C year-round. These subtropical ants do not require hibernation and may suffer if temperatures drop too low. Use a heating cable placed on top of the nest (never underneath where it could dry out the substrate) to maintain warmth if your room temperature is below 24°C. Create a temperature gradient so workers can move between warmer and cooler areas. During winter, a slight reduction to around 20-22°C is acceptable but not required. High temperatures above 30°C can be fatal, so avoid placing the nest in direct sunlight or near heat sources that could overheat.

Colony Development and Growth

The founding queen will seal herself into a chamber and lay eggs, this is typical claustral founding behavior. She will remain inside, feeding her first larvae from her own body reserves until the first workers emerge. This process typically takes several weeks, though it can vary with temperature. The first workers are smaller than mature workers but will begin foraging for food once they emerge. Carebara colonies can become moderately large over time. The colony will produce larger major workers (soldiers) as it grows, which serve for defense and processing tough food items.

Behavior and Temperament

The name 'hostilis' (hostile) suggests these ants have defensive behaviors. When disturbed, major workers will emerge to defend the nest. They possess a stinger but due to their tiny size, the sting is unlikely to penetrate human skin effectively. Workers are active foragers and will quickly discover and recruit to food sources. Their small size makes them excellent at finding tiny prey items in the nest. Despite their small size, they are bold and will readily tackle prey larger than individual workers by working together.

Frequently Asked Questions

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References