Macaroni penguins lay two eggs in a nest which is usually built in shade under vegetation or rocks.
Both parents incubate the eggs, rotating about every 7 to 12 days.
The early English explorers named this penguin. In the mid-18th century, a young man who wore flashy feathers in his hat was called a "Macaroni". This is also the origin for the words to "Yankee Doodle" sung during the Revolutionary War to poke fun at the poorly dressed Continental Army. The English explorers thought the yellow feathers of this penguin were like a fancy young man called a "macaroni".
All 17 penguin species are legally protected from hunting and egg collecting. The Antarctic Treaty of 1959 makes it illegal to harm, or in any way interfere with, a penguin or its eggs. Every penguin specimen collected with a permit must be approved by and reported to the Scientific Committee for Antarctic Research (SCAR). Penguins are vulnerable to habitat destruction, overfishing of primary food sources, ecological disasters such as oil spills, pollution such as trash in the ocean, and human encroachment into nesting areas.