Penguins – BBC
Flying penguins are a very recent addition to the penguin family in evolutionary terms. A few isolated species have evolved to make the most of their small wings, allowing them to migrate to warmer climes for the harsh Antarctic winter months. Elusive and secretive, these populations of penguin are extremely hard to locate in the rainforest and even seeing them fly on their migration is a rare experience. Little is yet known about just how these small birds survive flying over such vast distances, or why the anatomical differences they possess enable them to fly when other penguin families cannot.