Macaroni penguin female are similar in appearance; males tend to be slightly larger. Males also bear relatively larger bills, which average around compared to in females; this feature has been used to tell the sexes apart. Immature birds are distinguished by their smaller size, smaller, duller-brown bill, dark grey chin and throat, and absent or underdeveloped head plumes, often just a scattering of yellow feathers. The crest is fully developed in birds aged three to four years, a year or two before breeding age. Macaroni penguins moult once a year, a process in which they replace all of their old feathers. They
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