Lasius flavus – Yellow ant

Lasius flavus is a small, calm, and interesting ant species found in large parts of Europe, including the Netherlands and Belgium. This species is immediately noticeable due to its yellow to yellowish-brown workers and its largely subterranean lifestyle. In the wild, colonies are frequently found in grasslands, meadows, roadsides, and gardens, where they construct elaborate nests in the soil.

Worker Lasius flavus ants come above ground less frequently in the wild than many other ant species. A significant part of their diet consists of honeydew from root aphids that live underground on plant roots. In captivity, they also readily accept sugary liquids and small insects.

Due to their calm nature, easy care, and limited aggression, Lasius flavus is a suitable species for novice ant keepers. Colony growth is slow, especially at the beginning, but an established colony can eventually grow to several thousand worker ants.

Specifications

Scientific name: Lasius flavus
Dutch name: Yellow meadow ant

Distribution area: Europe and parts of West Asia

Color of the ant: Yellow to yellowish-brown; the queen is distinctly darker

Difficulty level: 1 / 5

Queen size: 7 – 9 mm
Worker size: 2 – 4.5 mm
Soldier size: Not available

Temperature: 18 – 25°C
Optimal temperature: 21 – 24°C

Winter dormancy: Yes, approximately November to February/March around 5 – 10°C

Growth rate: Slow to average

Maximum age of queen: approximately 15 – 20 years
Maximum age of worker bees: approximately 1 – 2 years

Grow to a number of workers: several thousand workers

Subfamily: Formicinae

Foundation: Claustral: the queen can raise the first workers without being fed during the foundation.

Colony formation: Usually monogyne: colonies can contain multiple queens.

Power supply

In the wild, Lasius flavus feeds largely on honeydew from subterranean root aphids. In a formicarium, the species can easily be fed a combination of sugars and small protein sources.

Food: small insects such as fruit flies, buffalo worms, small mealworms, small crickets, and pieces of redrunner.

Sugars: for example sugar water, honey water, Nectra and other suitable nectar foods.

For the development of larvae, it is important to regularly offer small insects as a source of protein.

Care

Lasius flavus prefers a slightly to moderately moist nest. Since this species naturally lives primarily underground, it feels comfortable in a relatively sheltered nest with a sufficient moisture gradient.

The species can be kept very well in a small formicarium. Because the workers are small, good escape protection is important.

From how many workers to a nest: approximately 30 – 50 workers

Recommended nest type:
Ytong nest, gypsum nest, 3D nest, acrylic nest or sand/loam nest

Lasius flavus is usually less visible in the arena than, for example, Formica or Pheidole species. It is precisely its quiet, natural nesting behavior that makes this species interesting for enthusiasts who enjoy following the development of a subterranean colony.

✅ Why choose Lasius flavus

• Striking yellow-colored workers
• Native European ant species
• Calm and relatively easy to care for
• Very suitable as a beginner species
• Interesting largely subterranean lifestyle
• Can be kept for years with proper care