Rockhopper penguin reaching full growth, they are about 20 inches in height. Males and females cannot be distinguished just by looks, so a DNA test is conducted by taking a feather from the bird to determine its gender. Like many penguins, rockhopper penguins have a white belly and the rest of their body is black. Some characteristics that differentiate them from the other penguins are their red eyes, orange beak, pink webbed feet, and the yellow and black spiky feathers they have on their head. Although their yellow and black spiky feathers differentiate them from other penguins, rockhopper penguin chicks do not
Fitcher's Bird as sign of disobedience"). Among Grimm's fairy tales, the forbidden door features here and in "Mary's Child" (AT 710), as have been remarked in the notes to that tale. Some European variants of the ballad "Lady Isabel and the Elf Knight", Child ballad 4, closely resemble this tale. Fitcher's Bird "Fitcher's Bird" (German: "Fitchers Vogel") is a German fairy tale collected by the Brothers Grimm, tale number 46. It is Aarne-Thompson type 311, the heroine rescues herself and her sisters. Another tale of this type is "How the Devil Married Three Sisters". The Brothers Grimm noted its close similarity to