Macaroni penguin "chrysolophus" is derived from the Greek words "chryse" "golden", and "lophos" "crest". The common name was recorded from the early 19th century in the Falkland Islands. English sailors apparently named the species for its conspicuous yellow crest; Maccaronism was a term for a particular style in 18th-century England marked by flamboyant or excessive ornamentation. A person who adopted this fashion was labelled a "maccaroni" or "macaroni", as in the song "Yankee Doodle". Molecular clock evidence using DNA suggests the macaroni penguin split from its closest relative, the royal penguin ("Eudyptes schlegeli"), around 1.5 million years ago. The two have generally
Bird egg the shell immediately before laying, but this research shows coloration is an integral part of the development of the shell, with the same protein responsible for depositing calcium carbonate, or protoporphyrins when there is a lack of that mineral. In species such as the common guillemot, which nest in large groups, each female's eggs have very different markings, making it easier for females to identify their own eggs on the crowded cliff ledges on which they breed. Bird eggshells are diverse. For example: Tiny pores in a bird eggshell allow the embryo to breathe. The domestic hen's egg has around