Dorymyrmex bicolor
Temperature
24–30 °C
Humidity
40–60%
Colony size
1,000–5,000
Queen size
4–5 mm
Worker size
2.5–3.5 mm
Diet
Care Guide
Dorymyrmex bicolor, commonly known as the bicolored pyramid ant or cone ant, is a charismatic and active species native to the warm, arid regions of the southwestern United States and northern Mexico. These ants are named for their distinctive two-tone coloration — workers sport a reddish-brown head and thorax contrasting with a dark gaster — and for the small, conical mounds of soil that mark their nest entrances. The queen is modest in size, measuring just 4 to 5 mm, while workers range from 2.5 to 3.5 mm. Colonies are claustrally founded by a single queen and can grow to between 1,000 and 5,000 individuals, forming bustling, sun-loving communities that are a joy to observe.
One of the most engaging traits of *Dorymyrmex bicolor* is their foraging behavior. These ants are fast, diurnal foragers that actively hunt for small insects and collect sweet secretions — they have a particular fondness for honeydew from aphids and scale insects, and they will eagerly take sugar water in captivity. Their diet should include a balance of protein in the form of insects (such as fruit flies, small crickets, or mealworm pieces) and carbohydrates from sugar water or honey water. Unlike many desert ants, they do not require a hibernation period, making them ideal keepers for those who want year-round activity.
Care difficulty
Keeping *Dorymyrmex bicolor* is considered an intermediate challenge, largely because of their specific temperature and humidity requirements. They thrive in warm conditions between 24 and 30°C, with a relatively low humidity of 40 to 60 percent. Maintaining these dry, warm parameters is essential for colony health. Additionally, these ants are known for their speed and agility — they can be escape artists if the formicarium is not properly sealed, so careful attention to barriers and connections is advised. Once their needs are met, however, they are hardy and rewarding.
Housing
A suitable formicarium for *Dorymyrmex bicolor* should provide a dry nest area with good ventilation, as excessive moisture can lead to mold or stress. A sand or clay-based substrate that retains slight humidity without becoming wet works well. The outworld should offer plenty of space for foraging and a heat source (such as a heating cable or mat) to maintain the warm end of their temperature range. Because they build conical mounds in nature, providing a deep, loose substrate in the outworld can encourage natural digging behavior. Regular feeding of insects and a constant supply of sugar water in a clean feeder will keep the colony thriving.
First days after purchase
After receiving your *Dorymyrmex bicolor* colony, place the formicarium in a quiet, warm location away from drafts and direct sunlight. Allow the ants to settle for at least 24 hours with minimal disturbance. Ensure the nest area has access to moisture through a hydrated test tube or a small water source, and offer a drop of sugar water to help the colony recover from transport. Observe from a distance — these ants are quick to resume activity, and watching their first explorations can be highly rewarding. Avoid frequent movement or vibrations during the acclimation period, and soon your bicolored pyramid ants will be building their characteristic nest cones and forming a lively, sun-worshipping colony.