Ten thousand, eight hundred and twenty endangered species in the animal kingdom - 5

You can count numbers all around you, from the eight legs on a spider to the one nose on your face. But can you count the stars in the sky or the fish in the Amazon? Find out all about ANIMALS in THE BIG COUNTDOWN, including evolution and classification, endangered species, reproduction and life cycles, habitats, migration and hibernation. Be amazed by the smallest and largest animals and the number of black feathers on a pink flamingo.

The Big Countdown looks at popular topics and investigates the great many numbers that make them fascinating. From the mind-bogglingly large to smallest and most precious, this series helps us understand that it's not just our days that are numbered.