Camponotus ocreatus Species Introduction
Claustral. A single queen seals herself in and raises the first workers on her own body reserves, and no food is needed. The timing is the unusual part. Flights for this species are recorded in December and January, so a queen can reach you in the middle of the season when every other colony you own is going into diapause. Found her warm.
A southwestern ant, running from California and Nevada through Arizona, New Mexico and Texas far down into Mexico, with Nevada records between 4,200 and 7,000 feet. Where it sits on the ground is the telling part: nests go under stones in rocky loam on north-facing slopes, in partial shade at the edges of woodland, rather than the open sun-baked ground much of the genus takes. Workers are clay-yellow with a black head, black scapes and black tibiae, minors running 7 to 9mm and majors to 12mm. Foraging is nocturnal, and the recorded flights fall in December and January, the wrong end of the calendar for almost every other Camponotus.
An easy-going, good-sized carpenter ant for a keeper who already runs a warm setup and wants something with presence. Camponotus ocreatus is the bigger, shade-seeking counterpart to C. sansabeanus, and the two get confused. Two things cost people colonies. The first is heat with nowhere to escape it, because these are ants that pick the shaded side of the hill. The second is the winter, either skipped outright or applied to a queen who flew in January and should have been founding.
Formicarium
The Substratum Sand Ant Nest reads closest to the rocky loam they dig into, and gypsum or hydrostone works as well. Majors carry serious mandibles, so keep soft media out of the setup once they arrive. The one thing worth building deliberately is shade. Give the nest a covered end and the arena somewhere dim to retreat into. They are large and climb well, so keep a fluon barrier maintained.
Water & Humidity
Moderately humid with a gradient, and a touch damper overall than the ridge-nesting carpenter ants of the same country. A north-facing slope under partial shade holds moisture where an open south face bakes it off, and the brood chambers sit in that. Keep one end reliably damp and let the warm end run dry. If the brood ends up jammed hard against the damp end, the dry side is too hot.
Recommended to use TrapJaw Labs PVA sponges during founding for improved success rates and more nanitics. A midwinter queen especially needs the tube to hold its moisture through a long founding.
Keep a liquid feeder with water (distilled, purified, or spring) in the foraging area at all times. They come from country where free water is scarce, and a colony will work a water feeder harder than most keepers expect through the warm half of the year.
Carbohydrates
Ample access to carbohydrates (sugars) is extremely important for all Camponotus, and this one is sold in the hobby as a sugar ant for good reason. They work honeydew and nectar through the night, and a standing sugar source is what a growing colony actually runs on. We recommend providing sugar-water (we use our Ant Nectar Mix) and fresh-water liquid feeders in the outworld at all times.
Occasional small honey drop in the outworld is fine. Put it out in the evening when they are coming on shift, rather than in the morning where it sits all day and ferments.
Keep the feeder stocked around the clock. Almost all the traffic happens after dark, so judge whether they are using it by the level in the feeder rather than by what you see during the day.
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 appropriate insect proteins, offered in the evening. A daytime item is often still sitting untouched at nightfall, which reads as refusal when it is only the clock.
TrapJaw Labs feeds our C. ocreatus colonies with pre-killed Drosophila melanogaster and D. hydei fruit flies, cockroach nymphs, and sliced mealworms. Leave items in place overnight rather than clearing them at bedtime, as this is a nocturnal forager and will usually collect after dark.
Two to three times per week. Increase amounts to scale with brood development.
Maintenance
Week 1: Settle the founding queen somewhere dark and undisturbed, and do not check on her. No food is needed. If she came from a December or January flight, keep her warm right through that winter instead of putting her in with the colonies going down for diapause. A founding queen has no colony to rest.
Weeks 8–10: First workers ('nanitics') appear, a couple of weeks later than C. sansabeanus under the same conditions. Put out a stocked sugar feeder and begin small pre-killed protein two to three times a week. Growth is slow through the first season, and that is normal rather than a sign anything is wrong.
Months 2+: Steady rather than explosive, with majors turning up once the colony is well past its first hundred workers. Move them up at about 75% of the nest space in use, and keep a shaded end in whatever you move them into. Keep the fluon barrier maintained as the colony grows.
Diapause may be required for this species. Camponotus ocreatus runs from about 40.3°N down to 18.5°N in Mexico, so the answer follows where your stock was collected rather than the species. High-country Arizona and New Mexico colonies from 4,200 to 7,000 feet should get 6–10 weeks from November at 45–55°F, while low-desert and Mexican stock needs little more than a cool, unheated rest. Remove supplemental heat but keep liquid food and water sources fully-stocked. One exception matters: a queen from a December or January flight is founding, not resting, and should be kept warm.
Care Summary
- Diapause length follows where the queen was collected, not the species
- A midwinter queen founds warm, she does NOT go into diapause
- Gradient 74–86°F with a genuinely cool, shaded end
- Carbohydrates available 24/7
- Protein 2–3×/week, put out in the evening
- Nocturnal foragers, so judge the colony after dark