Macaroni penguin and giant petrels also take chicks and sick or injured adult birds. Female macaroni penguins can begin breeding at around five years of age, while the males do not normally breed until at least six years old. Females breed at a younger age because the male population is larger. The surplus of male penguins allows the female penguins to select more experienced male partners as soon as the females are physically able to breed. Commencing a few days after females arrive at the colony, sexual displays are used by males to attract partners and advertise their territory, and by pairs
Empress of Germany's bird of paradise endemic to upper Ramu River and Huon Peninsula of northeastern Papua New Guinea. The male is polygamous and displays in communal lek. The diet consists mainly of fruits, insects and arthropods. One of the most heavily hunted birds of paradise in the plume hunting era, the Empress of Germany's bird of paradise was the first bird of paradise to breed in captivity. It was bred by Prince K. S. Dharmakumarsinhji of India in 1940. The name commemorates the German Empress and queen consort of Prussia, Augusta Victoria of Schleswig-Holstein. In the wild, the Empress of Germany's bird of paradise is