What is "macaroni penguin"

n. A species of penguin, ''Eudyptes chrysolophus'', with distinctive yellow and black plumes on the top of their heads.

The macaroni penguin (Eudyptes chrysolophus) is a species of penguin found from the Subantarctic to the Antarctic Peninsula. One of six species of crested penguin, it is very closely related to the royal penguin, and some authorities consider the two to be a single species. It bears a distinctive yellow crest, and the face and upperparts are black and sharply delineated from the white underparts. Adults weigh on average and are in length. The male and female are similar in appearance, although the male is slightly larger and stronger with a relatively larger bill. Like all penguins, it is flightless, with a streamlined body and wings stiffened and flattened into flippers for a marine lifestyle. They also have red eyes.

Its diet consists of a variety of crustaceans, mainly krill, as well as small fish and cephalopods; the species consumes more marine life annually than any other species of seabird. These birds moult once a year, spending about three to four weeks ashore, before returning to the sea. Numbering up to 100,000 individuals, the breeding colonies of the macaroni penguin are among the largest and densest of all penguin species. After spending the summer breeding, penguins disperse into the oceans for six months; a 2009 study found that macaroni penguins from Kerguelen travelled over in the central Indian Ocean. With about 18 million individuals, the macaroni penguin is the most numerous penguin species. However, widespread declines in populations have been recorded since the mid-1970s. Their conservation status is being reclassified as vulnerable.