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{{Taxonomy

{{Taxonomy

|name=Northern Rockhopper Penguin

|name=Northern Rockhopper Penguin

|image=

|image=NRockhopperPenguin.jpg

|caption=

|caption=

|domain=Eukaryota

|domain=Eukaryota

==Description==

==Description==

The Northern Rockhopper Penguin is medium-sized, standing 17.7 to 24.5 inches tall, and weighs up to 8.6 pounds.  The weight varies considerably over the course of a year, with their heaviest weights just before moulting.  Females are slightly smaller than males.  Adult birds have a narrow yellow streak of feathers over the eyes, which become elongated behind the eyes and protrude; further to the back of the head these feathers are striped yellow-black in the longitudinal direction and form a loosely fitting crest there. The eyes are red, the short, strong and bulging beak is reddish-brown, the feet and legs are pink, with the soles. The head and face are otherwise black. The top of the body is dark slate gray.  New plumage after the moult has a bluish shimmer.  Worn plumage just before moulting has a brownish tint.  The underside of the body is white, with the wings blue-black on the top and white underneath.  Chicks are completely black with a gray chin and throat, with a small, dull-colored beak; immature birds can be recognized by a matt yellow line above the eye and a reddish brown beak, but lacking a crest.

The northern rockhopper penguin is medium-sized, standing 17.7 to 24.5 inches tall, and weighs up to 8.6 pounds.  The weight varies considerably over the course of a year, with their heaviest weights just before moulting.  Females are slightly smaller than males.  Adult birds have a narrow yellow streak of feathers over the eyes, which become elongated behind the eyes and protrude; further to the back of the head these feathers are striped yellow-black in the longitudinal direction and form a loosely fitting crest there. The eyes are red, the short, strong and bulging beak is reddish-brown, the feet and legs are pink, with the soles. The head and face are otherwise black. The top of the body is dark slate gray.  New plumage after the moult has a bluish shimmer.  Worn plumage just before moulting has a brownish tint.  The underside of the body is white, with the wings blue-black on the top and white underneath.  Chicks are completely black with a gray chin and throat, with a small, dull-colored beak; immature birds can be recognized by a matt yellow line above the eye and a reddish brown beak, but lacking a crest.

==References==

==References==