Myrmica pinetorum
Temperature
18–24 °C
Humidity
55–75%
Colony size
500–3,000
Queen size
5.5–7 mm
Worker size
3.5–5 mm
Hibernation temp
5 °C
Diet
Care Guide
Myrmica pinetorum is a charming and active species native to the pine forests of northern Europe and Asia. Like many members of the genus, these ants are notable for their slender, reddish-brown bodies, long legs, and the presence of a functional sting — though their venom is mild and poses no risk to humans, it makes them formidable hunters of small invertebrates. The queen measures between 5.5 and 7 mm, while workers range from 3.5 to 5 mm. The colony does not exhibit strong polymorphism; all workers are monomorphic, but a mature nest of up to 3,000 individuals creates a lively, bustling society.
One of the most distinctive aspects of Myrmica pinetorum is their semi-claustral founding strategy. Unlike fully claustral queens that seal themselves in a chamber and rely on fat reserves, the Myrmica queen must leave the nest regularly to forage for food during the early stages. This makes colony establishment more delicate but deeply rewarding for the observant keeper. Once established, the colony thrives on a varied diet: a mix of live or frozen insects (such as small crickets, fruit flies, or mealworms) provides essential protein, while sugar water or diluted honey satisfies their carbohydrate needs. They are enthusiastic hunters and will readily accept any small protein source.
Care difficulty
Keeping Myrmica pinetorum is best suited for intermediate hobbyists who have some experience with semi-claustral species. The founding phase requires patience and careful feeding, as the queen cannot be left unattended for long periods. However, once the first workers emerge, the colony grows steadily and is quite hardy. The moderate colony size and manageable temperature and humidity requirements make them an excellent next step for keepers looking to move beyond beginner species. The need for a seasonal hibernation period adds an extra layer of routine that experienced keepers will appreciate.
Housing
A formicarium with good ventilation and a stable moisture gradient works best for this species. They prefer temperatures between 18 and 24°C and a humidity range of 55–75%. A test tube setup for the founding stage is ideal, transitioning later to a nest with connected outworld. The outworld should include a small water source and a feeding area. Because Myrmica pinetorum are sensitive to heat and dryness, avoid placing the nest in direct sunlight or near heating vents. Provide a substrate that retains moisture, such as sand-soil mix or plaster. Hibernation is essential for long-term health; from late autumn to early spring, gradually lower the temperature to around 5°C for several months, ensuring the colony remains in a dark, quiet place with minimal disturbance.
First days after purchase
Upon receiving your Myrmica pinetorum colony, transfer them carefully into a prepared test tube setup or small formicarium. Place the container in a dim, quiet location at around 20°C. In the first few days, avoid handling or opening the setup excessively. Offer a tiny drop of sugar water and a small insect piece near the entrance, but do not overfeed. Observe the queen’s activity — she should begin foraging for food if she is semi-claustral. If the colony includes workers, they will quickly start exploring and tidying the nest. Give them at least a week to acclimatise before any major interventions. During this time, ensure the water supply is constant and the humidity remains adequate. With careful attention, your Myrmica pinetorum colony will soon reveal its lively, forest-dwelling character.