To understand the reason of ecological success of invasive alien species, comparative studies between invaded area and native range are required. Some most harmful and widespread invasive ant species are originated from South America such as Argentine ant Linepithema humile , Little fire ant Wasmannia auropunctata , and Solenopsis fire ants. However, these species have little information about their ecological traits in their native range.

Field studies were conducted in March 2010 and December 2011 (late summer and late spring in southern hemisphere), in northern Argentina to collect the following ecological information; preferred habitat, population density, colony structure, natural enemies and competitive ant species of invasive alien ants especially Argentine ant in their native range.

In this presentation, I will introduce about these ecological traits of invasive alien ants in Argentina, and compare and discuss the ecological features between their invaded area and native range.