Camponotus evansi

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Native to the Middle East, specifically documented in Iraq (type location northeast of Baghdad) and Iran (Tehran area and Guilan province). They prefer moist habitats with moderate rainfall and are found both on plants and on the ground ^[2].
• Colony Type: Colony structure has not been specifically documented for this species.
• Size & Growth:
  • Queen: Size data unavailable, inferred from typical Tanaemyrmex subgenus patterns (~15-18mm)
  • Worker: Size data unavailable, inferred from typical Camponotus patterns (~6-12mm)
  • Colony: Likely reaches several thousand workers at maturity based on typical Camponotus development
  • Growth: Moderate
  • Development: Estimated 6-8 weeks at optimal temperature based on typical Camponotus development (First workers (nanitics) typically emerge smaller than normal workers.)
• Antkeeping:
  • Temperature: Keep nest area at 24-28°C. A heating cable on one side of the nest creates a gentle gradient that allows ants to thermoregulate. This species originates from a warm climate, so they handle temperatures in the mid-to-high 20s well.
  • Humidity: Maintain moderate to high humidity (50-70%). Their natural habitat in Iran includes moist areas, so keep the nest substrate consistently damp but not waterlogged. Provide a water tube for drinking water.
  • Diapause: Yes, Middle Eastern species likely require a winter rest period. Reduce temperature to 10-15°C for 2-3 months during winter, mimicking natural seasonal cycles.
  • Nesting: Use a Y-tong (AAC) nest or plaster/formicarium with chambers scaled to their large size. Provide a dark nesting area and ensure the nest maintains humidity without becoming soggy. Outworld should be spacious enough for foraging.
• Behavior: Typical carpenter ant temperament, generally calm but will defend the nest if threatened. Workers are large and confident foragers. They readily accept sugar water and protein sources. Escape risk is moderate due to their size, standard barrier methods work well. They are not aggressive toward keepers but can deliver a painful bite if handled roughly. As Formicinae ants, they lack a functional sting but can bite and spray formic acid from their acidopore into the wound.
• Common Issues: colonies often stall in growth if temperatures drop below 20°C for extended periods, improper humidity (too dry) leads to failed broods and queen mortality, winter die-off if diapause conditions are not provided or if temperature drops too suddenly, test tube setups become inadequate as colonies grow past 50 workers, early transition to formicarium prevents stress, large colonies may outgrow small outworlds, leading to escape attempts or stress-related issues

Nest Preferences and Housing

Camponotus evansi does well in Y-tong (AAC) nests or plaster formicariums that can maintain humidity. The nest chambers should be appropriately sized for their large body size, avoid chambers that are too tight, as these ants need room to move brood around. Keep the nest area dark (cover with an opaque sheet) and maintain substrate moisture. A water tube connected to the nest helps maintain humidity and provides drinking water. Since they come from moist habitats in Iran, the nest material should retain some dampness without becoming waterlogged. Transition from test tube setups to a formicarium once the colony reaches 30-50 workers to prevent space-related stress.

Feeding and Diet

Like other Camponotus species, these ants are omnivorous with a strong preference for sugar sources. Offer sugar water (1:3 ratio or honey diluted with water) constantly, they will consume it readily and it fuels colony growth. For protein, provide insects such as mealworms, crickets, or other appropriately sized prey. Feed protein 2-3 times per week, adjusting based on colony size and consumption. Remove uneaten prey after 24 hours to prevent mold. They also accept fruit occasionally. Workers are large and capable of tackling prey items that smaller ants cannot handle.

Temperature and Seasonal Care

Maintain temperatures between 24-28°C in the nest area for optimal brood development. A heating cable placed on one side of the nest creates a thermal gradient that lets ants choose their preferred temperature zone. This species is from a warm climate and will be more active at higher temperatures. During winter (roughly November through February in the Northern Hemisphere), gradually reduce temperature to 10-15°C to provide a proper diapause period. This winter rest is important for colony health and triggers reproductive behavior in the following spring. Do not skip diapause as it can lead to colony decline over time.

Behavior and Colony Dynamics

Camponotus evansi exhibits typical carpenter ant behavior, workers are confident foragers that will readily explore the outworld searching for food. They are not particularly aggressive but will defend the nest vigorously if threatened. The large workers can deliver a bite if handled roughly, though they generally calm down once the colony is established. Colony growth is moderate, expect the first workers (nanitics) to emerge smaller than mature workers. As the colony grows, worker size increases significantly. Major workers with enlarged heads typically appear in mature colonies. These ants communicate through chemical trails and will establish reliable foraging routes once food sources are discovered.

Frequently Asked Questions

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References