Linepithema humile

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Linepithema humilis, Argentine ant
Source: Wikimedia Commons

Linepithema humile (Mayr, 1868) - (Argentine ant)
is native to northern Argentina and southern Paraguay. It has invaded many other regions and now has an almost world-wide distribution. The ant has become a serious urban pest in the invaded areas. It readily enters houses in search for food and water. Part of its success has been attributed to the fact that individuals from different nests rarely compete with each other. Therefore, the nests can be regarded as being part of "super colonies" which can extend over hundreds and thousands of kilometers. It also tends aphids and mealybugs and protects pests in agricultural areas. On the other hand it has also been also reported as a useful predator of pest insects. Female workers are about 2½ mm long, males about 3 mm. The development time from egg to adult worker is about 3 months.

Vernacular names
• Deutsch: argentinische Ameise
• English: Argentine ant
• Español: hormigas argentinas
• Français: fourmi d'Argentine

For more details see the respective page in Wikipedia.