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.

Winged Wonders
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.