Bleeker Island, off the Falklands: These are two of a small colony of rockhopper penguins, so-called because they nest on cliffs hundreds of feet above the ocean and climb up and down by hopping. These penguins, along with macaroni penguins later on in this trip, practice what's called obligatory sibling murder: they have two chicks each year, and the stronger of the two kills the weaker one. And you thought they were all so cute.

Previous photo

Next photo