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 and cheese with bread crumbs or crushed crackers, which also keeps the noodles on top from drying out when baking. One novelty presentation is deep-fried macaroni and cheese found at fairs and food carts. In Scotland, macaroni and cheese can often be found incorporated into a pastry shell, known as a macaroni pie. Macaroni and cheese pizza can be found on recipe web sites and US restaurant menus, such as Cici's Pizza. A similar traditional dish in Switzerland is called (Alpine herder's macaroni), which is also available in boxed versions. "Älplermagronen" are made of macaroni, cream, cheese, roasted onions, and in some