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 of the main ingredients made the dish affordable, and recipes made it accessible, but not notably popular. As it became accessible to a broader section of society, macaroni and cheese lost its upper class appeal. Macaroni and Cheese was brought to Canada by British immigrants, coming from other parts of the British Empire. Macaroni and cheese recipes have been attested in Canada since at least "Modern Practical Cookery" in 1845, which suggests a puff pastry lining (suggesting upper-class refinement); a sauce of cream, egg yolks, mace, and mustard; and grated Parmesan or Cheshire cheese on top. Canadian Cheddar cheese was