Mammals are the only animals whose females produce milk to feed their young.
Dinosaurs roamed the earth up until 65 million years ago.
Reptiles are present on every continent except Antarctica.
Fish came into existence long before dinosaurs roamed the earth.
Invertebrate species live in almost every habitat on the planet in what can sometimes be astonishing numbers.
Mammals are the only animals who produce milk to feed their young.
Reptiles are mostly cold-blooded animals with dry, scaly skin.
Not all birds can fly but all have feathers and can lay eggs.
These fascinating creatures have been around since the late Jurassic Period.
Fish have been around for an estimated 450 million years.
Invertebrates are some of the most complex and ancient animals on the planet.
The largest natural history survey of Canada ever seen on television.
Nigel Marven likes his snakes - even the deadly ones!
Drawing on the latest science Ice Age Giants explores how these incredible beasts lived.
Great Bear Stakeout watches the every move of a population of grizzly bears.
Looking good! Browse photos of David Attenborough's second series of Natural Curiosities.
The most populous country in the world is also one of the most wild.