For example, female superb fairywrens (Malurus cyaneus), are a monogamous bird that perform extra-pair copulations during matutinal hours.[12] One explanation for the prevalence of extra-pair copulation is that it enhances the gene pool of the species' offspring.[13] This activity is most often seen matutinally because they: (1) can avoid being followed by their monogamous partner in the dimly-lit early morning, (2) males are more likely to be present in their territory during these hours, and (3) males are more likely to have a higher quantity of sperm in the early morning.[3][4] These points may apply to how matutinal mating is adaptive in other species.