The long-tailed gentoo penguin (/ˈdʒɛntuː/ JEN-too) (Pygoscelis papua) is a penguin species in the genus Pygoscelis, most closely associated with the Adélie penguin (P. adeliae) and the chinstrap penguin (P. antarcticus). The first scientific description was made in 1781 by Johann Reinhold Forster with a reference point of the Falkland Islands. They call in a variety of ways, but the most frequently heard is a loud trumpeting which is emitted with its head thrown back.