Killer Instinct with Rob Bredl

What do saltwater crocodiles, reticulated pythons, and kangaroos have in common? That killer instinct. An animals' instincts can be used for either defensive or offensive measures.

Rob Bredl has dedicated his life to animals, and after 40 years of contact with crocodiles, he hopes other people may learn to live with and respect these prehistoric creatures.

Venture into the compelling and thrilling world of the shark. Shark ancestry predates the dinosaurs, and their survival is a direct consequence of their instinct to kill.

Few countries in the 21st century can claim to have big cats roaming free in their natural habitat. The role of zoos has changed considerably, in some cases preserving key species.

There are more than 3,000 species of lizards. For most of these unique creatures it is a daily battle between their instinct to hunt and their instinct to avoid becoming prey.

Like thieves in the night, they lie in wait. Camouflaged, patient, and often deadly, spiders are not insects, but arachnids, and they play a positive role in ecosystems.

With all the advantages of a large mammalian predator in Australia, the dingo has successfully carved itself a bloody place in history. Is the dingo misunderstood?

More than 2,000 species of marsupials flourish on the isolated continent of Australia, one-quarter of which are carnivorous, representing Australia's dominant species.

Sometimes, it is not the size of the animal in the fight, but the size of the fight in the animal that matters. The killer instinct is alive and well among the urban birds of prey.

Four-fifths of the Earth's surface is water, providing plenty of room for myriad marine life, including a variety of venomous creatures that are among the Earth's most deadly.

Even though pythons lack toxic venom, large pythons can be very dangerous. In fact, they can kill their prey faster than poisonous snakes can by using a strangulation method.

30 years ago, crocodiles in Australia were facing extinction. Since then, the work that has been put in by the Bredl family has led to a resurgence in the crocodile population.