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 and cheese frozen macaroni and cheese available in the United States. "Macaroni and cheese loaf" can be found in some stores. A variety of packaged mixes which are prepared in a sauce pan on the stove or in a microwave oven are available. They are usually modeled on Kraft Macaroni & Cheese (known as Kraft Dinner in Canada), which was introduced in 1937 with the slogan "make a meal for four in nine minutes." It was an immediate success in the US and Canada amidst the economic hardships of the Depression. During the Second World War, rationing led to increased popularity for