Emus mate for life; the male incubates 7 to 10 dark green eggs, 13 cm (5 inches) long, in a ground nest for about 60 days.

Are emus monogamous?

Emus are socially monogamous — they form tight breeding pairs for most of the year — but, unusually among birds, all parental care falls to the male. ... It's surprising, then, that males will often unknowingly raise offspring that are not their own: both female infidelity and brood parasitism are common.

How often do emus mate?

Emus begin their breeding cycle once yearly. Emus begin breeding in December to January, up to once daily. Nesting occurs around 50 days after breeding.