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
Macaroni casserole Macaroni casserole Macaroni casserole is a baked macaroni casserole. It is especially known as a staple in northern European home cooking. It is a dish of cooked macaroni and a mixture of egg and milk with additional ingredients like meats, vegetables or fish. It is commonly made with cheese and/or breadcrumbs sprinkled on top. The dish is reminiscent of a frittata, with the main difference being that it is baked entirely in the oven. It is usually eaten with ketchup. In Finland, the dish is called "makaronilaatikko" (Finnish) or "makaronilåda" (Swedish), and is one of the most popular traditional dishes.