Macaroni penguin been considered separate species, but the close similarities of their DNA sequences has led some, such as the Australian ornithologists Les Christidis and Walter Boles, to treat the royal as a subspecies of the macaroni. The two species are very similar in appearance; the royal penguin has a white face instead of the usually black face of the macaroni. Interbreeding with the Indo-Pacific subspecies of the southern rockhopper penguin ("E. chrysocome filholi") has been reported at Heard and Marion Islands, with three hybrids recorded there by a 1987–88 Australian National Antarctic Research Expedition. The macaroni penguin is a large, crested
Macaroni Macaroni Macaroni (, Italian: Maccheroni) is dry pasta shaped like narrow tubes. Made with durum wheat, macaroni is commonly cut in short lengths; curved macaroni may be referred to as elbow macaroni. Some home machines can make macaroni shapes, but like most pasta, macaroni is usually made commercially by large-scale extrusion. The curved shape is created by different speeds of extrusion on opposite sides of the pasta tube as it comes out of the machine. In North America, the word "macaroni" is often used synonymously with elbow-shaped macaroni, as it is the variety most often used in macaroni and cheese