Over the 120 million years of their evolution snakes have developed from lizard-like creatures to the most deadly assassins imaginable; discover the secret nature of these killer reptiles.

All spiders are carnivores and they have come up with a bewildering number of different ways to catch a prey. Most impressive of all is their ability to produce one of the strongest natural materials known - silk. And they have learned to use it for a variety of purposes, from building protective nests for their offspring to weaving elaborate traps and even deadly weapons to kill their next meal.

There's no two ways about it, flies disgust us. They bite us in our sleep, contaminate our foot, and spread diseases. But love-them or loath-them, flies have vital roles to play. So become a fly on the wall as Secret Nature spies on Incredible Flies.

We embark on a journey of the Planet of the Ants to witness the massacre of an army ant raid, to examine the intricate relationship between acacia ants and their host tree, and to marvel at the architectural prowess of weaver ants. Incredibly detailed photography bring the ants up close and personal, allowing us a glimpse of a secret world all around us.

The game of life takes on new dimensions when you play with the killers of the skies. Birds of Prey make up 10% of all bird species. They're designed to deal the card of death with speed, stealth and surprise. They're at the pinnacle of aeronautical design, adapted and refined into a huge range of killing machines.