In Australia, "Monomorium" species is particularly successful. This fact is particularly curious because of the presence of a very aggressive ant family, "Iridomyrmex", which is quite proficient at interference competition. "Iridomyrmex" ants are able to quickly seek out food sources and prevent other ant species from reaching them. However, unlike other ant species, "Monomorium" species, despite their unaggressive nature and small size, are able to thrive even in areas where "Iridomyrmex" dominates. This success can be attributed to their efficient foraging strategy, and their novel use of venom alkaloids, repellant chemical signals. With these two behaviors, "Monomorium" species can rapidly monopolize and defend food sources.