* Magic, the miniature pony who helped a woman speak again after three years of silence

* Stubby, the stray dog who braved the front line with soldiers in World War One

* Moko, the bottlenose dolphin who guided a mother whale and her calf back out to sea

Have you ever been astonished by an instance of animal agility, intelligence or bravery?

No matter how cute and cuddly our animal companions are, there are always occasions when they remind us that they're still in touch with their natural instincts. Sometimes this comes through in little ways, and other times they do something that is truly amazing - even to the point of saving human lives.

Animal Heroes contains some of the most extraordinary true tales of bravery across the natural world, from domestic pets to wild animals, proving that when it comes to facing danger there's more to them than meets the eye.