Lasius lasioides - "Brown Garden Ant"
Lasius lasioides is a small, shy ant species from the Lasius brunneus complex, often mistaken for other common Lasius ants like Lasius niger due to its dark brown coloration. Workers are typically dark to medium brown, with pale yellowish-brown tibio-femoral joints, scapes, and sometimes the anterior margin of the clypeus. They are known for their preference for areas with trees, nesting under bark, in dead logs, or beneath stones. Unlike some of their more aggressive Lasius relatives, Lasius lasioides workers are quite timid and will often hide if their nest is disturbed. This species is relatively easy to care for, making them a suitable choice for ant keepers, especially those in Southern Europe where they are common.
- Difficulty: Easy
- Origin & Habitat: Southern Europe, North Africa, Anatolia, and parts of the Middle East (e.g., Iran, Syria, Israel) in Diverse habitats with the presence of trees, including open forests, dense forests (both broad-leafed and coniferous), urban areas, gardens, pastures, and roadsides with scattered trees. They can be found from sea level up to 1750 meters in altitude..
- Colony Type: Monogyne (single queen), claustral (queen seals herself in) founding.
- Size & Growth:
- Queen: 7.0-9.0mm
- Worker: 2.0-5.0mm
- Colony: Large (tens of thousands). Medium growth.
- Antkeeping:
- Temperature: For optimal development, keep the nest area between 21-24°C. The outworld can be kept a bit cooler, ranging from 18-28°C. Room temperature is generally sufficient, but a heat mat can help speed up brood development..
- Humidity: Maintain a humidity of 50-60% in the nest section, and 30-50% in the outworld. They do not thrive in overly dry conditions, so ensure consistent moisture..
- Diapause: Required. 5-5 months at 5.0-8.0°C.
- Nesting: This species prefers to build nests in soil, under stones, or within dead wood. Suitable artificial setups include Ytong/plaster nests, acrylic nests, or natural soil setups..
- Behavior: Low (towards handler, but protective of nest) aggressiveness.
- Common Issues: Mold in nest, Humidity fluctuations, Escape artists (due to small size and speed), Colony stalling (if diet is not varied or diapause is skipped).
One key thing to remember about Lasius lasioides is their inherently shy nature. Unlike some bolder ant species, these ants tend to retreat and hide when their nest is disturbed or the outworld is opened. This isn't a sign of aggression or stress towards the keeper, but rather a natural defense mechanism. It's important for antkeepers to respect this behavior and provide them with plenty of hiding spots and undisturbed areas within their formicarium setup. This can include decor like small branches, roots, or stones in the outworld, and opaque covers for nest sections.
Their diet is quite straightforward, primarily consisting of sugary liquids like honey water and various insects for protein. Young larvae, especially, need a good source of protein to develop properly. Offering a variety of insect prey, such as fruit flies, mealworms, or crickets, can ensure they get all the necessary nutrients. Remember to offer a diverse diet; feeding them the same thing repeatedly might slow down their colony's growth over time. Always ensure any feeder insects are captive-bred to avoid introducing parasites or pesticides to your colony.
Lasius lasioides colonies are quite adaptable regarding temperature, thriving well at typical room temperatures. However, for those aiming to accelerate brood development and observe faster colony growth, providing a gentle heat source, such as a heat mat, to a portion of the nest can be beneficial. It's crucial to use a thermostat with any heating element to prevent overheating, which can be detrimental to the entire colony. Creating a temperature gradient allows the ants to choose the most comfortable spot for their brood and themselves.
Diapause, or hibernation, is a non-negotiable requirement for Lasius lasioides to maintain the long-term health and vitality of the queen and the colony. Typically, this period should last from late October to late March, at a cool temperature between 5-8°C. This allows the queen to rest and prepares the colony for a new season of robust egg-laying. While hibernating, the ants will be largely inactive and won't require feeding. Ensuring a proper diapause cycle mimics their natural environment and contributes significantly to the longevity of your colony.
These ants are not particularly messy, leaving behind mostly pupal husks and uneaten insect parts. Regular, but not excessive, cleaning of the outworld is recommended to prevent mold growth, especially around food waste. Their small size and speed can make them quite good at escaping if there are any gaps in your setup, so ensure your formicarium is escape-proof. Despite their shyness, once the colony reaches a certain size (around 25-40 workers), they become more active and protective of their nest, showcasing interesting behaviors for observation.
Frequently Asked Questions
Are Lasius lasioides a good ant species for beginners?
Absolutely! Lasius lasioides are considered a very easy ant species to keep, making them an excellent choice for beginner ant keepers. Their adaptability and straightforward care requirements are a big plus.
What should I feed my Lasius lasioides colony?
Your Lasius lasioides colony will thrive on a diet of sugary liquids like honey water or sugar water, which provide essential carbohydrates for the workers. For protein, vital for the queen and developing brood, offer various insects such as fruit flies, small mealworms, or crickets. Remember to vary their protein sources for optimal health!
Do Lasius lasioides need to hibernate?
Yes, Lasius lasioides require a period of diapause, or hibernation, to remain healthy long-term. This usually runs from late October to late March at temperatures between 5-8°C. This resting phase is crucial for the queen’s well-being and the colony's overall health, mimicking their natural cycles.
What kind of nest is best for Lasius lasioides?
For Lasius lasioides, suitable formicariums include Ytong/plaster nests, acrylic setups, or natural soil environments, as they prefer nesting under stones, in soil, or in dead wood in the wild. Smaller colonies can initially thrive in a test tube setup with access to an outworld.
How large can a Lasius lasioides colony get?
Lasius lasioides colonies can grow quite large, reaching populations of up to 40,000 individuals, making them a sizable and impressive colony to observe over time.
Are Lasius lasioides workers aggressive?
Lasius lasioides workers are generally quite shy and not aggressive towards handlers. If their nest is disturbed, they tend to retreat and hide rather than attack. However, once a colony reaches a certain size, they will become more protective of their brood and nest.
What is the ideal temperature for Lasius lasioides?
The ideal temperature for the nest area of your Lasius lasioides colony is between 21-24°C to promote healthy brood development. The outworld can be slightly cooler, ranging from 18-28°C. While they tolerate room temperature, a gentle heat source can be used to boost growth.
Do Lasius lasioides have a sting?
No, Lasius lasioides do not possess a functional sting. Like many Lasius species, they can spray small amounts of formic acid as a defense mechanism, but this is generally not a concern for keepers.
How fast do Lasius lasioides colonies grow?
Lasius lasioides colonies exhibit a medium growth rate. While not as explosively fast as some other common Lasius species, they establish and grow steadily, eventually reaching impressive numbers with proper care.
Where do Lasius lasioides naturally live?
Lasius lasioides are native to Southern Europe, North Africa, and parts of Anatolia and the Middle East. They are frequently found in varied environments that include trees, such as forests, urban parks, gardens, and pastures, often making their nests under logs, stones, or tree bark.
Are Lasius lasioides prone to escaping?
Due to their relatively small worker size and quick movements, Lasius lasioides can be quite adept at finding and exploiting any small gaps in a formicarium setup. Ensuring your ant enclosure is completely escape-proof is crucial to prevent escapes.
What are the common issues faced when keeping Lasius lasioides?
Common issues in Lasius lasioides care can include mold growth in the nest if humidity is not managed correctly, fluctuations in humidity levels, colony stalling if their diet isn't varied or if diapause is skipped, and, as mentioned, their tendency to escape if the setup isn't secure enough.
