Camponotus decipiens Care Sheet (Lesser Red Carpenter Ant)

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I'm Anthony Prothero, the founder of Stateside Ants. I've been an antkeeper for over a decade and I've kept Camponotus decipiens more than 4 years with hundreds of colonies. This is everything I know about keeping them, including the naming confusion that nobody else in the hobby will explain to you.

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What is Camponotus decipiens?

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Camponotus decipiens is a small carpenter ant native to the southeastern and south-central United States, ranging north into the lower Midwest. It belongs to the subgenus Myrmentoma, the group of small, twig-nesting carpenter ants that most keepers skip over in favor of the giants like C. pennsylvanicus and C. castaneus.

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That's a mistake. C. decipiens gives you everything that makes Camponotus worth keeping, including true polymorphism with distinct minor and major workers, bold, stunning bicoloration, and the classic carpenter ant behavior in a colony that fits on the shelf instead of taking up an entire room. Plus, they'll grow faster than other carpenter ants due to their smaller size!

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You can find Camponotus decipiens for sale in the US here.

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How to identify Camponotus decipiens

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The minors are slender, with a reddish to amber head and mesosoma set against a distinctly darker gaster. The majors carry a blocky, oversized head, with mandibles built for tearing food and working wood. The size difference between the two castes is dramatic for an ant this small, and it's the main reason to keep them.

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Queens are around 10mm and share the bicolored pattern. Next to a castaneus or pennsylvanicus queen they look compact, but they're stocky for their size.

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Where Camponotus decipiens is found

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The range covers much of the southeastern US, from the Gulf Coast north through the lower Midwest. In the wild they nest in dead twigs, rotting branches, hollow stems, and under bark. You'll find them in wooded edges, open woodland, and suburban yards wherever there's dead woody material.

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Colonies stay modest by Camponotus standards, usually in the high hundreds to a few thousands of workers at maturity.

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Camponotus decipiens vs. Camponotus discolor: what's the difference?

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You'll see this ant sold as Camponotus discolor about as often as Camponotus decipiens, and sometimes as both names on the same listing.

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That isn't sloppiness. The two are genuinely difficult to separate, they overlap in range, and different authorities have reached different conclusions about material from the same populations. 

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With our current taxonomy (which is complicated but what we have for now), here's how to tell them apart. In facial view, Camponotus decipiens will have no hairs on their cheek, while C. discolor will have multiple. Our decipiens have been verified by checking the workers from colonies!

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Is Camponotus decipiens good for beginners?

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Yes, it's pretty good! And the reason why is largely their hardiness. They're very good at staying alive, recovering from issues quickly and returning to growth. The only problem could be that they grow slower than some other ants and need a short diapause, but if you have a bit of patience, this beautiful species could be for you.

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When does Camponotus decipiens fly?

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Nuptial flights for Camponotus decipiens tend to begin early in the year (February or March further south, April/May further north). They'll fly on warm evenings with recent rain as long as the wind isn't crazy!

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If you catch a queen and want to know what to do next, start with our guide on keeping an ant colony.

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Founding and the queen

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Camponotus decipiens is fully-claustral. The queen raises her first batch of workers entirely from her own body reserves, and she should not be fed until those first workers hatch. Feeding a claustral queen early stresses her, and stressed queens eat their brood. Leave her alone in the tube.

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If she looks very thin once she has pupae, a single small drop of liquid sugar won't hurt, but it isn't recommended and it usually isn't necessary.

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This species is monogynous. One queen per colony. Queens will often tolerate each other through the brood stage and then fight once workers arrive, so don't combine them. 

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In a test we did in 2026, with 4 groups of dual founding queens in a 16x150mm test tube, we found that single queens tended to outperform dual queens in founding. This could be due to a lack of space. 1 of the groups fought before workers arrived. 

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Growth rate and colony size

A well-fed, properly heated colony can reach 100+ workers in its first year, with the high end closer to 200. Egg to worker runs around 50 days at good temperatures.

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Like most Camponotus, decipiens lays in batches rather than a steady trickle, so growth arrives in waves. You'll get a stretch where nothing appears to be happening, then a dozen workers at once. That's the species working normally!

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Majors start appearing around 12-30 workers. Feeding as much as you can will encourage majors!

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Temperature and humidity

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Keep most of the nest at 80°F, with a warmer spot in the upper 80s and a small, cooler section in the 70s. Camponotus as a genus does worse at high temperatures than most keepers expect, and this species is no exception. Run them a little cool rather than a little hot.

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Unlike Camponotus castaneus, C. decipiens does enjoy those warmer temperatures! Just make sure to always have a cooler 'reserve', in case of a heating accident or dehydration.

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In a test tube, heat only the very front, never near the water reservoir. Heating the reservoir floods the tube and it also destroys the gradient the ants use to regulate themselves. Watch their behavior: crowded at the far end means it's too warm, pressed against the warm end could mean it's too cool. Give them a good gradient and let the ants choose where each brood and worker sits.

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Humidity should be high in a good section of the nest and noticeably lower elsewhere so the colony can choose. Keep a test tube setup attached or sitting in the outworld regardless of what nest you use. It costs nothing, it's a refuge if the nest dries out, and if you find the whole colony piled into it, that's your warning that something is going on with the nest.

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Choosing a nest

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Don't move this species into a nest they can't fill at least half to two-thirds of. A colony in an oversized nest turns the empty chambers into a garbage dump, and cleaning that out later means tearing the setup apart. Grow them out in the tube longer than you think you need to, they love to be in small spaces!

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In the wild, this species nests in wood. Thin galleries and chambers in tiny sticks or larger pieces of wood. For this reason, they're accustomed to smaller spaces! Don't worry about them being crowded.

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Feeding Camponotus decipiens

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Liquid sugars are the base of the diet, of course. Sugarwater, honeywater, or Sunburst should always be available. A colony where every worker is thin and flat-gastered is a colony that isn't growing.

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For protein, this species prefers fruit flies with dubia roaches on the side. Like most Camponotus, they want small, soft food they can carry back whole rather than large pieces they have to process in the outworld. Fruit flies are the safe default for young colonies. Once the colony has a few workers, larger and more nutrient-dense feeders like Dubia roach pieces become worth offering. Just make sure it's only a chunk of a dubia, or a small one pre-killed.

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Feed often rather than heavily. Small amounts most days beats a large pile once a week. Match your protein to the size of the larvae pile, and scale by watching: if three fruit flies vanish by the next day, offer more next time. Overfeeding beats underfeeding every time, as long as you manage the trash. Give them as much as they'll take, then a bit more. This signals to the queen she can lay more eggs, and multiplies colony growth over time.

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Judge how well-fed they are by their gasters. Plump and inflated means well fed on sugars, flat and skinny means they need food. I keep at least 60-70% of the colony plump so nobody goes hungry, while leaving room in their stomachs for protein.

Remove uneaten protein within 16-24 hours. Past that you're inviting mold and mites, and both are much easier to prevent than to fix.

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One Camponotus-specific point: these ants spray formic acid when subduing prey. It's harmless to you but not harmless to them if it accumulates in a sealed setup. Give them an outworld with an absorbent floor (plaster, Ultracal, or a sand layer) rather than making them kill inside the nest. If the nest seems to have built up formic acid stains, a bit of sterile sand to cover it so they aren't walking all over it can help.

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Hibernation

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Camponotus decipiens does require a short diapause. Our queens are from the southern portion of their range, where there's a slump in growth, but not a long one. 

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If you're hibernating them, cool them slowly over a couple of weeks instead of dropping them straight into the cold. Bring them into the 50s and low 60s first and cut back on protein to signal the change. The queen slows her laying, the larvae stop pupating. Then bring them down to about 41°F for 1-2 months. No more than 60 days of diapause should be necessary.

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Keep the nest hydrated through diapause. Ants still need moisture when they're cold, and dehydration kills more hibernating colonies than the cold does. Make sure the workers go in with full gasters. When the time's up, warm them over several days and resume protein and sugars. The queen usually starts laying again within a few weeks.

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Quick summary

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Keep your Camponotus decipiens at around 80°F across most of the nest with a real gradient and a high-humidity section. Feed liquid sugars constantly and fruit flies with the occasional dubia as often as they'll take them. Don't overheat them, don't oversize their nest, and be patient through the quiet stretches between brood batches.

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Common questions

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Is Camponotus decipiens the same as Camponotus discolor? To keep these ants is, essentially, the same thing. There are taxonomic differences that we can get into, but for your average antkeeper, there's going to be little to no difference at all.

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How big do Camponotus decipiens colonies get? 1000+ workers.

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Does Camponotus decipiens need hibernation? Yes, a short one.

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How fast does Camponotus decipiens grow? 100+ workers in the first year.

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Can Camponotus decipiens sting? No. Like all Camponotus, they have no sting. They bite and can spray formic acid, neither of which is a concern for a keeper. Don't handle the ants directly, of course.

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What do Camponotus decipiens eat? Liquid sugars, as well as protein like fruit flies and dubia roaches.