Analysis of information sources in references of the Wikipedia article "Gentoo penguin" in English language version.
Until the 1930s, the gentoo was generally known in the Falklands as the Johnny penguin.
In the 18th century, English-speaking sealers commonly called [the gentoo] the Johnny penguin. The Spanish translation of this was Juanito, which has degenerated into gentoo.
Sealers called it the "Johnny penguin" or "John penguin." In that incarnation, it seems to have given its name to the striated caracara, a bird of prey that feeds on young gentoo penguins in the Falklands and is called the "Johnny rook".
Breeding pairs of Pygoscelis papua remained constant throughout the 1996/1997 breeding season. Males observed attempting to breed outside of their original breeding pair were violently ejected from the colony.
Breeding pairs of Pygoscelis papua remained constant throughout the 1996/1997 breeding season. Males observed attempting to breed outside of their original breeding pair were violently ejected from the colony.
