 Territories average in woodland-heath areas; size decreases with increasing density of vegetation and increases with the number of males in the group.The group consists of a socially monogamous pair with one or more male or female helper birds that were hatched in the territory, though they may not necessarily be the offspring of the main pair.Splendid fairywrens are sexually promiscuous, each partner mating with other individuals and even assisting in raising the young from such trysts.