Thank you! Yeah, Fire Ant was my first suggestion. Though, after some quick research, it may be a Weaver Ant (Oecophylla smaragdina. Although, i'm way better in identifying snakes, so i probably shouldn't talk. :'))
Bernard Werber's Empire Of The Ants in fact is one of may favourite novels altogether. It's been years since i've read it the last time, though (which i should change).