Camponotus sansabeanus Species Introduction

Bicolored high-desert carpenter ants that nest under sun-baked stones and need a real winter. Species Introduction Claustral: a single, newly-mated queen seals herself in a chamber and raises her first workers entirely on stored nutrients and metabolized wing muscles. Named for San Saba County, Texas, and ranging west and north from there across the arid interior into northern Mexico. In Nevada they are most common in pinyon-juniper between 4,700 and 7,500 feet, and also turn up in sagebrush and oak woodland. Nests run deep into rocky, gravelly loam with the upper chambers tucked under a surface stone. Monogynous and strongly polymorphic: minors run 5 to 7 mm and are pale yellow, majors reach 9 to 11 mm with broad, distinctly darker heads, and mature colonies build into the low thousands. Workers are timid, and this is one of the few ants documented neutralizing fire ant venom with their own formic acid. A tough, heat-tolerant carpenter ant that asks very little day to day and then asks for one big thing: a real winter. Camponotus sansabeanus comes from country that freezes, and colonies pushed straight through the cold season without a diapause bleed workers until spring. They are also nervous ants that scatter the moment you open the nest. Formicarium Gypsum, hydrostone, and the Substratum Sand Ant Nest all work well, and the sand nest reads closest to the rocky loam they dig into in the wild. Majors carry real mandibles, so avoid soft nest media once they arrive. These are large, capable climbers, so keep a fluon barrier maintained on the outworld and give them a deep, decorated arena they can retreat into. Warm and forgiving. We suggest a gradient of 74–86°F across the setup, which brackets the soil temperatures their brood chambers sit at through the growing season. They nest under stones that bake by day and cool hard at night, so a night drop does them no harm. 1/2" recommended for this large-bodied species. Red dimming cover for the nest. They spook easily and settle much faster with one. Water & Humidity Moderately humid with a strong gradient. Their nests run deep into dry, rocky loam, but the brood chambers sit well below the surface where moisture holds while the ground above bakes. Keep one end of the nest damp and let the other end run dry and warm, then leave the ants to sort it out. They will move brood to the end they want, and where they put it tells you whether you have the gradient right. Recommended to use TrapJaw Labs PVA sponges during founding for improved success rates and more nanitics. Keep a liquid feeder with water (distilled, purified, or spring) in the foraging area at all times. Carbohydrates Ample access to carbohydrates (sugars) is extremely important for all Camponotus. In the wild C. sansabeanus works aphid and scale honeydew and extrafloral nectaries through the night, and a colony without a standing sugar source stalls before it shows you any other symptom. Occasional small honey drop in the outworld is fine. This species takes honey enthusiastically, and it is a useful way to coax a nervous young colony into committing to the foraging area. We recommend providing sugar-water (we use our Ant Nectar Mix) and fresh-water liquid feeders in the outworld at all times. Protein Camponotus carry a gut symbiont (Blochmannia) that, in layman's terms, supplements their diet and recycles nutrients. The result: they require far less protein than most ants. We still recommend providing them with appropriate insect proteins, and C. sansabeanus takes them readily once the colony is past its first dozen workers. TrapJaw Labs feeds our C. sansabeanus colonies with pre-killed Drosophila melanogaster and D. hydei fruit flies, cockroach nymphs, and sliced mealworms. They are shy hunters and will often retreat before collecting an item, so leave it in place and give them the night to find it. Two to three times per week. Increase amounts to scale with brood development. Maintenance Week 1: Settle the founding queen somewhere dark and undisturbed. Stress from disturbance can cause her to consume her own brood, so avoid checking on her during this process. If founding in a test tube with a TJL sponge, humidity and water will be maintained throughout this process. Weeks 6–8: First workers ('nanitics') appear. Put out a stocked sugar feeder and start offering small pre-killed protein two to three times a week. Egg to adult worker runs roughly six to seven weeks at the warm end of the gradient, so population climbs slowly through the first season — that's normal. Months 2+: Growth is steady rather than explosive in the first year, then the colony picks up speed after its first diapause and majors start appearing. Move them to a larger nest once they are using about 75% of the space. Keep the fluon barrier maintained as the colony grows — this is a big, capable ant, and a mature colony will test the walls. Diapause is required for this species. C. sansabeanus ranges from the Texas hill country up into high-desert pinyon-juniper between 4,700 and 7,500 feet, and those populations sit through a genuinely cold winter. We recommend a diapause period of 10–14 weeks, starting in late October. Wind the heat down over a couple of weeks first so the colony finishes off any large larvae, then remove supplemental heat entirely but keep liquid food and water sources fully-stocked. A reliable mini fridge or wine cooler, or an insulated garage, is recommended if temperatures can be kept between 42–55°F. Colonies pushed straight through the winter without one lose workers steadily and stall the following spring. Care Summary Obligate diapause, 10–14 weeks from late October Damp end, dry end, let them choose Gradient 74–86°F, night drops are fine Carbohydrates available 24/7 Protein 2–3×/week Fluon barrier maintained, and a red cover to settle them Every day: Check liquid feeders are full Mon/Wed/Fri: Offer pre-killed protein, clear leftovers within 24h Every other week: Top up nest water on the damp end