Myrmecocystus mimicus
Temperature
24–32 °C
Humidity
30–50%
Colony size
1,000–5,000
Queen size
10–13 mm
Worker size
4–10 mm
Diet
Care Guide
Myrmecocystus mimicus, commonly known as the mimic honey pot ant, is a fascinating species native to the arid regions of the southwestern United States and Mexico. What sets these ants apart is their remarkable ability to store liquid food within the abdomens of specialized workers called repletes. These living storage vessels hang from the nest ceiling, their gasters swollen to the size of small grapes, providing a vital water and sugar reserve during dry periods. The colony exhibits clear size variation: the queen measures 10–13 mm, while workers range from 4–10 mm. Unlike some polymorphic species, all workers can potentially become repletes when food is abundant, though larger workers are more commonly used for this purpose.
The diet of Myrmecocystus mimicus is centered around carbohydrate-rich liquids. In the wild, they collect honeydew from aphids and tend to exudates from oak galls. In captivity, they thrive on a steady supply of sugar water or honey water, supplemented with insects for protein. Small crickets, fruit flies, or mealworms are ideal. It is important to note that repletes require regular access to liquid food to maintain their stores; a colony without enough sugar water may struggle to develop repletes, which are crucial for colony resilience during dry spells.
Care difficulty
Keeping Myrmecocystus mimicus is considered advanced due to their specific humidity and temperature requirements, as well as the need to manage replete formation. These ants are highly active and fast-moving, requiring secure escape prevention. The nest should be kept warm, between 24–32°C, with a localized hotspot around 30°C for brood development. Humidity must be low, around 30–50%, mimicking their desert origin. Overly damp conditions can lead to mold and stress. No hibernation is needed, so they can be kept active year-round with consistent heating.
Housing
A formicarium for Myrmecocystus mimicus should offer a dry nesting area with good ventilation, along with a separate outworld for foraging. The nest can be made of plaster, grout, or natural sand-clay mixes. A water source in the outworld (e.g., a test tube with a cotton plug or a water dispenser) is essential, but the nest itself must never be waterlogged. Provide a spacious foraging area where sugar water can be offered in a dish or gravity feeder. Because repletes need to hang, a vertical nest design with chambers high enough to accommodate swollen gasters is beneficial. The colony grows to 1,000–5,000 workers, so plan for eventual expansion.
First days after purchase
Upon receiving your Myrmecocystus mimicus colony, transfer them gently into their new formicarium and place it in a quiet, warm location. Offer a small droplet of sugar water and a few pinhead crickets. Minimize vibrations and bright light for the first 48 hours while the ants acclimate. Observe whether the queen is laying eggs and if any repletes are already present. If repletes are present, do not disrupt them—they are the colony’s lifeline. Ensure the nest remains dry and the water supply is fresh. With patience and careful attention to temperature and humidity, your colony will soon begin to display the unique honey-pot behavior that makes this species so captivating.