Penguins are highly social and communicative creatures. Each penguin has a distinct call that identifies their mate or baby. It's like you or me calling out "Hey Ralph!". In other words, they communicate well within their social structure. They prefer to be in groups. This is partly for social connection, partly for survival, and partly for warmth. They huddle in groups to stay warm. In fact, they rotate their group formation, allowing the outer penguins inside the inner circle. That way, everybody gets a chance to be in the middle of the warm "group hug!". - Avia      Humboldt penguin (Spheniscus humboldti)

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