Myrmica gallienii - "Bog Ant"
Myrmica gallienii is a fascinating medium-sized ant species, typically reddish-brown in color, known for its strong exoskeleton and distinct propodeal spines on its back. These active ants are well-adapted to life in wet environments and are often mistaken for Myrmica rubra due to their similar appearance and shared habitats. However, Myrmica gallienii workers tend to walk a bit slower, hold their antennae more perpendicular to their heads, and possess a noticeably darker, more square-shaped head compared to the shinier, more forward-antennae-holding M. rubra. Their ability to form large, populous colonies and unique adaptations to flooding, such as 'rafting,' make them a captivating species for antkeepers.
- Difficulty: Medium
- Origin & Habitat: Central Europe, West Siberia, and parts of Asia (e.g., Iran) in Wet meadows, marshes, fens, lake and pond shores, stream banks, seasonally flooded grasslands, and even floating reedbeds. They can also be found in saline land and will nest in the ground, often under moss, grass clumps, or decaying plant material, or deeper in sandy areas..
- Colony Type: Polygyne (multiple queens), semi-claustral (queen forages) founding.
- Size & Growth:
- Queen: 6.0-6.5mm
- Worker: 4.0-5.0mm
- Colony: Medium (thousands). Reproduction starts slowly, then speeds up. In the first year, colonies typically reach 20-40 workers, growing to several hundred in the second year, and eventually reaching several thousand workers. growth.
- Antkeeping:
- Temperature: Room temperature is generally suitable. For optimal activity and brood development, a temperature range of 21-24°C is preferred. If heating, only warm a portion of the nest to allow ants to thermoregulate..
- Humidity: High humidity is crucial for this species, ranging from 50-70% or even higher. The nest should be kept consistently moist, as they are prone to drying out. Regular hydration of the nest is essential..
- Diapause: Required. 4-4 months at 5-8°C.
- Nesting: Myrmica gallienii thrives in humid nest setups. Ytong nests and natural soil setups are recommended, as they allow for better moisture retention. Wooden or dry 3D-printed nests are not ideal. They will dig their own nests in soil, and small colonies can start in test tubes with an outworld..
- Behavior: Medium (towards handler, food or other ants) aggressiveness.
- Common Issues: Dehydration, Humidity fluctuations, Lack of protein for queen during founding, Mold in nest (due to high humidity if not managed well).
One of the most remarkable adaptations of Myrmica gallienii is their ability to 'raft' during floods. These ants are often found in habitats prone to inundation, and when water levels rise, workers will link together to form a floating mass. This incredible behavior allows them to survive floods and even disperse to new areas. When setting up their formicarium, try to mimic aspects of their natural, moist environment to keep these fascinating ants thriving. Think about how their nest might get humid in the wild, and replicate that in your setup.
Unlike many ant species where queens are fully claustral, Myrmica gallienii queens are semi-claustral. This means they will venture out to forage for food during the founding stage, even before their first workers arrive. Providing a consistent source of protein and sugary liquids from the very beginning is crucial for a successful founding and the healthy development of her initial brood. Don't starve your queen; she needs those nutrients!
Myrmica gallienii, like other Myrmica species, possesses a sting, which they readily use if disturbed. While their venom is potent, a sting is generally not dangerous to humans, typically causing only redness and itching similar to a nettle sting. However, it's always wise to exercise caution when handling them. Their aggressive nature also makes them efficient hunters, so be prepared to offer them plenty of insect prey, which they will readily accept.
Colonies of Myrmica gallienii can sometimes be confused with Myrmica rubra in the field. Beyond the subtle walking and head shape differences, it's worth noting that M. gallienii colonies tend to be somewhat less common across their range compared to M. rubra, although they can be dominant in specific localized habitats, especially in Poland. Careful observation and understanding their preferences for very wet environments can help in identification.
