Previously classed as a single species, the rockhopper penguin has now been split into a northern (Eudyptes moseleyi
) and southern species (Eudyptes chrysocome
) (3). Although both species are similar in appearance, the distinctive yellowish plumes extending from the yellow line above the eye are significantly longer and denser in the northern rockhopper penguin (2) (3). The body is small but robust, with slate-grey upperparts and white underparts, the bill is short and reddish-brown and the eyes are red. Juveniles can be identified by the lack of adult yellow markings (2).