Penguins are among the best-known and most easily recognized of all birds; they are also among the most beloved. The appeal of the penguin is easy to understand. These large, awkward birds waddle along comically with an air of bustling importance. They are extremely tame and curious around humans. And because they walk upright, have flippers instead of wings, and resemble someone wearing formal attire, they remind us irresistibly of ourselves.