Camponotus modoc
Temperature
20–26 °C
Humidity
50–70%
Colony size
2,000–10,000
Queen size
15–17 mm
Worker size
6–13 mm
Hibernation temp
6 °C
Diet
Care Guide
Camponotus modoc is one of the most impressive and rewarding large carpenter ant species native to North America, often found nesting in decaying conifer wood in the Pacific Northwest and Rocky Mountains. These ants display notable size variation within the colony, with the queen measuring up to 17 millimeters and workers ranging from 6 to 13 millimeters. The largest workers, often called majors, possess robust heads and powerful mandibles, serving both as defenders and as capable foragers. This polymorphism adds a visual richness to the colony as it matures.
As a claustral founding species, the queen seals herself inside a small chamber after mating and raises her first brood on her own metabolized wing muscles—no feeding is required during this initial stage. Once the first workers emerge, they take over foraging and brood care, and the colony grows steadily toward a mature size of several thousand individuals. Camponotus modoc is a nocturnal species, so while you may not see constant surface activity during the daytime, their nighttime foraging is a delight to observe, particularly when they explore sugar water feeders or hunt for protein-rich insects.
Care difficulty
Keeping Camponotus modoc is best suited for intermediate keepers. Their care is not overly demanding, but they do require a proper hibernation period and a spacious formicarium that accommodates their need for wood-like nesting structures. Because they are naturally inclined to chew and excavate soft wood, providing a nest with cork or rot-resistant timber inserts mimics their wild environment and encourages natural behavior. They thrive at temperatures between 20 and 26°C during the active season, with humidity levels of 50 to 70 percent—slightly drier than some tropical species but still requiring occasional moisture in the nest area to prevent desiccation of brood.
Housing
A formicarium for Camponotus modoc should include ample vertical and horizontal space, as these ants prefer to expand their galleries in flat, sandwiched designs or naturalistic wood setups. The outworld should be escape-proof and large enough to accommodate their foraging runs. Regular feeding of insects such as crickets, mealworms, or roaches provides essential protein, while sugar water or honeydew satisfies their carbohydrate needs. Overfeeding can lead to rapid colony growth, so adjust portions based on worker numbers. One critical requirement is hibernation: from late autumn through early winter, the colony must be cooled gradually to around 6°C for at least two to three months. Without this dormant period, the queen may stop laying eggs and the colony’s long-term health will decline.
First days after purchase
When your Camponotus modoc colony arrives, place the test tube or transport container in a quiet, dark location and let them settle for at least 24 hours. Check that the water source is not blocked and that the humidity feels adequate. Avoid sudden temperature changes. During the first week, offer a small drop of sugar water and a tiny insect piece to see if the workers accept food. If they seem stressed, wait another day before introducing food. Give them time to establish a comfort zone, and soon you will witness the steady, determined work of these beautiful carpenter ants as they build their new home.