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 and brought the recipe back to Monticello. Jefferson drew a sketch of the pasta and wrote detailed notes on the extrusion process. In 1793, he commissioned American ambassador to Paris William Short to purchase a machine for making it. Evidently, the machine was not suitable, as Jefferson later imported both macaroni and Parmesan cheese for his use at Monticello. In 1802, Jefferson served "a pie called macaroni" at a state dinner. The menu of the dinner was reported by Reverend Manasseh Cutler, who apparently was not fond of the cheesy macaroni casserole. Nevertheless, since that time, baked macaroni and cheese