<p><strong>Fig. 5.44.</strong>&nbsp;(<strong>D</strong>) Adélie penguins (<em>Pygoscelis adeliae</em>) exhibiting porpoising swim behavior, Antarctica</p>

Fig. 5.44. (D) Adélie penguins (Pygoscelis adeliae) exhibiting porpoising swim behavior, Antarctica

Image courtesy of Jason Auch, Flickr