Colobopsis schmeltzi

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Fiji islands, endemic to Viti Levu, Ovalau, and five other major islands in the Fijian archipelago. Found in tropical rainforests where they nest in dead branches and rotting wood, both dry and slightly moist ^[2][4].
• Colony Type: Colony type is unconfirmed. Based on typical Camponotus patterns, likely single queen colonies.
• Size & Growth:
  • Queen: Size data unavailable, no direct measurement exists in the research context. Based on genus patterns, likely around 9-12mm.
  • Worker: 5.4mm ^[3]
  • Colony: Maximum colony size is unknown. Based on related arboreal Camponotus species, likely reaches several hundred workers at maturity.
  • Growth: Moderate, typical for tropical carpenter ants
  • Development: Estimated 6-8 weeks at optimal tropical temperatures (25-28°C). Development timeline is inferred from genus patterns, not confirmed for this species. (Development likely faster than temperate species due to tropical origin)
• Antkeeping:
  • Temperature: Keep at 24-28°C. These are tropical ants from Fiji, so they need warm, stable temperatures year-round. A heating cable on one side of the nest creates a gentle gradient allowing them to regulate their temperature.
  • Humidity: Moderate humidity around 60-75%. Their natural habitat is tropical rainforest, but they nest in dry dead branches more often than moist logs. Provide a moist area in the outworld and a dry area in the nest for them to choose between ^[2].
  • Diapause: No, as a tropical species from near the equator, they do not require hibernation. Keep temperatures consistent year-round.
  • Nesting: Arboreal nesting preference, they naturally nest in dead branches and rotting wood. In captivity, a Y-tong (AAC) nest or plaster nest with wood-like chambers works well. Avoid fully soil-based nests as they prefer dry nesting chambers. Provide twigs or small wood pieces in the outworld as enrichment ^[2].
• Behavior: These ants are relatively docile and not aggressive toward keepers. As carpenter ants, they are capable of chewing through soft materials but are not destructive to formicariums. Workers are active foragers that will search the outworld for food. They have the typical Camponotus defense mechanism, they bite and spray formic acid from their acidopore. Escape risk is moderate, workers at 5.4mm are not tiny but can still squeeze through small gaps, so standard escape prevention measures apply.
• Common Issues: tropical temperature requirements mean colonies can struggle in air-conditioned rooms or cool climates, arboreal nesting means they may reject ground-level test tube setups, provide elevated nesting options, as a rare species with limited data, founding colonies can be challenging and slow, dry branch nesting preference means overly humid nests can cause problems, balance moisture carefully, limited availability in the antkeeping hobby means this species is difficult to acquire

Housing and Nest Setup

Colobopsis schmeltzi is an arboreal species, meaning they naturally nest above ground in dead branches and rotting wood rather than underground. In captivity, this means you should avoid traditional test tube setups placed flat on the ground. Instead, provide a nest that mimics their natural tree-hole habitat. A Y-tong (AAC) nest works well because it has narrow chambers similar to the inside of a branch. Plaster nests with wood-textured chambers are another good option. You can also create a naturalistic setup with small twigs or cork bark pieces in the outworld for them to explore and potentially nest in. The key is providing a dry nest chamber, these ants prefer nesting in dead, dry branches more than moist rotting wood ^[2].

Feeding and Diet

Like other carpenter ants in the genus Camponotus, C. schmeltzi is an omnivore that accepts both sugar sources and protein. Offer sugar water, honey, or diluted maple syrup as a constant carbohydrate source. For protein, provide small insects like fruit flies, small crickets, or mealworms. In the wild, these ants are foragers that likely collect honeydew from aphids and scale insects, so they may also accept aphid sugar water. Feed protein prey 2-3 times per week, and keep sugar water available at all times. Remove any uneaten prey after 24-48 hours to prevent mold. Since this is a tropical species, they may have higher metabolisms and benefit from more frequent feeding during warm periods.

Temperature and Heating

Being from tropical Fiji, these ants need consistently warm temperatures to thrive. Keep the nest area between 24-28°C (75-82°F). Unlike temperate ant species that can tolerate room temperature, tropical species like C. schmeltzi can become sluggish or stop brood development entirely if temperatures drop too low. Use a heating cable or heat mat on one side of the nest to create a warm zone, but always place heating on top of the nest rather than underneath to prevent excessive drying and moisture problems. Room temperature alone is likely insufficient unless your home is naturally warm. Monitor colony activity, if workers are clustered together and not foraging actively, they may need more warmth. Avoid temperature fluctuations and keep them away from air conditioning vents.

Humidity and Water

These ants come from a tropical rainforest environment but nest primarily in dry dead branches, so they need a balance of humidity. Aim for around 60-75% humidity in the nest area. Provide a water tube or small dish in the outworld so they can drink. In the nest, keep one area slightly moist and another dry, allowing the colony to self-regulate. The key is avoiding both extremes, too wet and you'll get mold and mite problems, too dry and the colony may desiccate. Mist the outworld occasionally rather than flooding the nest. Since they naturally nest in dry branches, err on the drier side rather than overwatering ^[2].

Frequently Asked Questions

Report an Issue

The current care sheet is based fully on literature. See inconsistencies, or something that's incorrect? Please report here, it will be resolved after review from an admin. Contributing to the blogs tab also helps providing information, to make us be able to further improve the caresheets. Thank you for your support!

References