name: Lasius umbratushomeland: Europa, north africa caste: monogyn, sometimes oligogynappearence of the queen: 7-8 mm dark brown, yellow appearence of the workers: 3 - 4 mm blackappearence of the soldiers: --- nest building: In the sand/loam ground, Trees, dead wood etc.temperature: Romm temperature, keeps hibernation air humidity: Moderate climate number of basins: 1 basin is adequade dimension of the basin: At least 30x20x20 cm (adjust to the colony size) soil conditions: Sand, loam , cork, woodplanting: Only nessecary for plant louse culture accessories: Not necessary level: 1 hazard class: 1 risks: carefull, ants like woodspecifics: life in trees and has big colonysquantity: one fertilized queen with workers (see selection); brood (depending on the season and development)