Emu's Role Reversal

The roles are reversed when it comes to breeding for emus.  

 Picture from Carolina Emu

Unlike most other animals, it is the female emu who must compete for a mate.  Once the male has chosen a mate, the two will breed frequently, with the female laying up to 20 eggs during the summer months.  Also opposite from the traditional gender roles, it's the male's job to incubate the eggs after they have been laid by the female, who will leave the nest to find another mate.