Colobopsis howensis

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Endemic to Lord Howe Island, a subtropical island off the coast of New South Wales, Australia. Likely nests in rotting wood or under bark in the island's forests ^[1][2].
• Colony Type: Colony structure is unconfirmed. No specific data on queen number exists for this species.
• Size & Growth:
  • Queen: Size data unavailable, no documented measurements for queens
  • Worker: Minor workers: 4.5-5mm total length. Major workers: approximately 5-6mm ^[3]
  • Colony: Maximum colony size is unconfirmed
  • Growth: Moderate
  • Development: Estimated 6-8 weeks at optimal temperature based on genus-level Camponotus data (Development time inferred from related Camponotus species, actual timing unconfirmed for this species)
• Antkeeping:
  • Temperature: Keep around 22-26°C. Lord Howe Island has a subtropical climate, so moderate warmth is appropriate.
  • Humidity: Moderate to high humidity. Keep substrate moderately moist but not waterlogged. Provide a water source.
  • Diapause: Winter diapause requirements are unconfirmed for this species. Further study needed.
  • Nesting: Y-tong (AAC) nests or plaster nests work well. They prefer nesting in wood or tight spaces. Provide a nest chamber scaled to colony size with narrow passages.
• Behavior: Generally calm and non-aggressive. Like other Colobopsis species, they lack a functional sting. Instead, they spray formic acid from an acidopore as their primary defense. Major workers may also use their flattened head to block nest entrances. Foraging occurs primarily at night. They are moderate escape artists, use standard barrier methods.
• Common Issues: limited biological data makes precise care recommendations uncertain, humidity control is important, too dry causes brood loss, winter rest period is unconfirmed, observe colony behavior, wild-caught colonies may be stressed from island collection and transport, growth rate is moderate, requires patience

Housing and Nest Setup

Colobopsis howensis does well in standard ant keeping setups. Y-tong (AAC) nests provide excellent visibility and work well for this species. Plaster nests are also suitable and help maintain humidity. The nest should have chambers scaled to the colony size, avoid overly large spaces as these ants prefer tight, enclosed areas. A test tube setup works for founding colonies, with a cotton ball separating the water reservoir from the ants. Once the colony reaches 15-20 workers, consider moving to a formicarium. The outworld should have a simple foraging area with a sugar water station and protein food dish. ^[3]

Feeding and Diet

Like other Camponotus-type ants, Colobopsis howensis is omnivorous. They accept sugar sources readily, offer sugar water, honey, or diluted maple syrup. For protein, provide small insects like fruit flies, small mealworms, or cricket pieces. In the wild, they likely forage for honeydew and small invertebrates. Feed protein 2-3 times per week, and keep sugar water available at all times. Remove uneaten protein after 24 hours to prevent mold. Minor workers are small, so ensure prey items are appropriately sized.

Temperature and Seasonal Care

Maintain temperatures between 22-26°C for optimal colony activity and brood development. A heating cable on one side of the nest creates a temperature gradient so ants can choose their preferred zone. During winter, you may reduce temperature slightly to simulate seasonal variation, but exact diapause requirements are unconfirmed for this species. Observe your colony's behavior to determine appropriate seasonal care.

Humidity and Water

Lord Howe Island has a humid subtropical climate, so Colobopsis howensis appreciates moderate humidity. Keep nest substrate consistently moist but not waterlogged, the substrate should feel damp but not have standing water. A water test tube provides constant access to moisture. Mist the outworld occasionally, especially if the colony is active. However, avoid excessive moisture which promotes mold. Ensure good ventilation to prevent stagnant air while maintaining humidity.

Behavior and Colony Dynamics

This species shows typical Camponotus behavior, workers are generally calm. Major workers have a distinctive phragmotic (truncated) head shape which they may use to block nest entrances as a defensive strategy. Like all Formicinae ants, they lack a functional sting and instead spray formic acid from their acidopore as their primary defense. Foraging typically occurs during evening and night hours. Workers communicate through chemical signals and may use tandem running to recruit nestmates to food sources. ^[3]

Frequently Asked Questions

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References