Strange Creatures: Series 1 The amazing thing about nature is the number of ways it continues to surprise us - and in the case of these unique creatures, it appears we're barely scratching the surface. Spend some time in the company of nature's evolutionary mavericks.<br /><br />Winged Wonders<br />The biggest bird in the world can't fly. Another relies on a mustache to attract mates. And one colorful aviator has a bill so big, it needs special vertebrae to carry it around. Meet nature's flying iconoclasts and learn why they've evolved a unique appearance to give themselves an edge.
