Solenopsis clarki

Quick Summary

• Difficulty: Medium
• Origin & Habitat: Western Australia, Australia. Found across the southwest (SWBP) region and possibly into the Kimberley region ^[1]. Nests under rocks, wood, bark, and in excavated galleries of other ant species ^[1].
• Colony Type: Colony structure is not documented. Workers are polymorphic with minor and major castes, but whether colonies are monogyne or polygyne is unknown.
• Size & Growth:
  • Queen: Size data unavailable
  • Worker: Size data unavailable – polymorphic minor and major workers exist but no measurements published ^[1]
  • Colony: Unknown (estimated several hundred workers based on related Solenopsis, but not confirmed)
  • Growth: Unknown (no data available for this species)
  • Development: Estimated 6–10 weeks at 22–26°C based on related Solenopsis species (no specific data for S. clarki) (Development time is a genus-level estimate – actual times may differ)
• Antkeeping:
  • Temperature: No specific data. Based on Mediterranean climate of Western Australia, aim for 22–26°C with a slight gradient. Provide a cooler area in the nest ^[1].
  • Humidity: Keep the nest substrate moderately moist but not waterlogged. Their natural nesting under rocks and in soil suggests they prefer stable humidity with a moist area and a drier area ^[1].
  • Diapause: Unknown, but likely beneficial given the cool winters in Western Australia. If keeping in temperate climates, consider a 2–3 month winter period at 10–15°C. No feeding during this time ^[1].
  • Nesting: Y-tong (AAC), test tube setups, or naturalistic soil nests work well. Provide damp substrate and avoid rapid drying. Do not place near direct heat sources ^[1].
• Behavior: Behavior is not well documented. They have a functional stinger (Myrmicinae subfamily) but are not reported as aggressive. Their small size and reduced eyes ^[2] mean they rely on chemical cues and can escape through tiny gaps – ensure your setup is well sealed. Temperament is likely calm, based on the few field observations.
• Common Issues: humidity dropping too low can stress colonies – check nest moisture regularly, reduced eyes mean they navigate by scent, so avoid clutter in the outworld, lack of published care data makes troubleshooting harder for beginners, winter diapause may be needed but is unconfirmed – observe colony health if skipping it, wild-caught colonies may carry mites or other parasites

Housing and Nest Setup

Solenopsis clarki does well in Y-tong (AAC) nests, test tube setups, or naturalistic formicariums with soil. In the wild, nests are found under rocks, pieces of wood or bark, and in abandoned galleries of other ants ^[1]. This suggests they prefer stable, moderately moist environments. For Y-tong nests, keep the water reservoir filled but not overflowing – provide a humidity gradient. For test tubes, use a standard water tube with a cotton plug and connect additional tubes so the colony can choose its preferred humidity. A naturalistic setup with 2–3 cm of damp soil (sand/soil mix) works well. Avoid heat sources that dry the nest rapidly. Room temperature (22–24°C) is fine, with a slight warm spot if your home is cool ^[1].

Feeding and Diet

Solenopsis clarki are likely omnivorous like most Solenopsis. Offer a varied diet: small insects (fruit flies, pinhead crickets, mealworms) for protein 2–3 times per week, and provide a constant sugar source (sugar water, honey, or diluted honey). They will recruit nestmates to rich food sources. Remove uneaten prey after 24–48 hours to prevent mold. Polymorphic workers may handle different food items, but this is not documented for this species.

Temperature and Seasonal Care

No specific temperature data exists for S. clarki. They originate from the Mediterranean climate of Western Australia, with warm summers and cool, wet winters ^[1]. A good starting point is 22–26°C for active growth, with a slight gradient so workers can thermoregulate. During winter (June–August in Western Australia), consider a cool period at 10–15°C for 2–3 months to mimic natural conditions. This is unconfirmed but likely beneficial. If your colony is kept indoors at steady temperatures and shows no decline, diapause may not be essential. Do not feed during the cool period. Resume normal temperatures and feeding in spring.

Colony Founding

Founding behavior is unconfirmed for S. clarki. The queen is not described in available literature. Based on typical Solenopsis patterns, it is assumed queens found claustrally – sealing themselves in a chamber and raising the first brood on stored reserves – but this has not been documented for this species. If you obtain a queen, provide a dark, humid test tube and do not disturb her until workers appear. The first worker emergence time is unknown, but a genus estimate of 6–10 weeks is reasonable. Major workers may appear later as the colony grows.

Behavior and Temperament

Little is known about S. clarki behavior. They have a functional stinger, like other Myrmicinae, but field observations do not describe them as aggressive. The most notable trait is their reduced eyes: they either lack eyes or have only a tiny pigmented speck ^[2]. This means they rely heavily on chemical communication and tactile cues rather than vision. In captivity, this may affect how they explore – they prefer simple, easy-to-navigate outworlds where scent trails stay clear. They are not reported to be escape artists, but their small size requires a tight-fitting lid.

Frequently Asked Questions

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References