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The fastest and slowest animals!

The Illustrated Encyclopaedia of Fast and Slow Animals

A packshot of the Enclyclopaedia of Fast and Slow Animals. Text reads 'OUT NOW!'

Who would win a race between a carrier pigeon and a silver-haired bat? Is the Australian tiger beetle faster or slower than a basset hound dog?

Find out all this and more in The Illustrated Encyclopaedia of Fast and Slow Animals! This fascinating book gives you the inside track on 60 amazing animals – from fast-swimming gentoo penguins and slow-moving gila monsters to immortal jellyfish that can live ‘forever’. Whoa!

So whether you enjoy life in the slow lane or like to take things super-fast, make sure you catch up with this brilliant book! On your marks, get set… read!

Texyt reads; "Giant pandas are the ‘couch potatoes‘ of the animal world – they’re almost as slow as three- toed sloths! Brown hares reach speeds of 60kmph when running in a straight line! The black marlin is one of the fastest fish on the planet, clocking in at 128kmph!

Headshot of Sami Bailey, author of The Encyclopaedia of Fast and Slow Animals.

Meet the author!

Award-winning author and illustrator Sami Bayly told us all about her fact-packed book…

Hi Sami! What inspired you to write this book?
I’ve loved uncovering new and unusual animals with every book I’ve written. And while I already knew about some famous fast and slow animals, I always wondered why they could do the things they did. So this was the perfect opportunity to learn! 

What’s your favourite fact from the book?
There are so many! Did you know that the Australian tiger beetle is the fastest insect on the planet?! It runs 2.5 metres per second – even though it’s just 2cm long!
I also discovered it uses its strong jaws to break apart its prey and squirts digestive juices onto its victim to slurp the meal up. Gross, right?! 

Would you rather be a super- fast or super-slow animal?
I think I’d like to be a flying fish. They can glide up to 400m in around 45 seconds! But it would also be cool to turn back into a baby again, like the immortal jellyfish! 

Wow! What’s the most unusual fact you discovered?
I was blown away by the fact that the quickest animal in relation to its size is the Californian mite, a 0.7mm arachnid. If we humans could run 322 body lengths per second (like this mite does), we’d be going 2,317kmph! 

What other encyclopaedias would you like to write?
I’ve always got so manyideas running through my mind. But I’d love to one
day make an encyclopaedia of cute animals (to go alongside my ugly animal encyclopaedia) – so watch this space!

WIN THE ENTIRE ILLUSTRATED ENCYCLOPAEDIA COLLECTION!

Book images of each of the 'Illustrated Encyclopedia' children's book series.

Click here to find out how to enter.

Illustrations © Sami Bayly 2025.
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COMMENTS1

  • 67

    Very cool!

  • emghh

    good facts

  • Tom

    Coooòooooooooooooòooool

  • Gnarlykid2.0

    Those facts are just Wow!!!

  • Nidhika

    I love it soooo much

  • Nid

    I like it!

  • deegan

    cool

  • 67

    this is so cool

  • Jngf

    Coooooooooooool

  • Winterflare23

    Omg that is sooooo cool

  • h

    cool!

  • Coco

    That is so cool

  • night

    cool i love it and you guyes work nice job

  • kitty cat cat

    cheaters are the fastest land animal. and a slugs are the slowest animals.

  • Manha

    This was a amazing text and the auther is sooo pretty!!!!!!!!!!!!!!!!

  • Imogen

    I'm Imogen

  • Kara

    I really want that book

  • Freddie

    I really loooooooove Sami Bayly's books !!!!!!!!!!!!!!!!!!!!

  • Ruby

    It was so goooooooooooooooooood

  • laijon

    i like this

  • Arlo

    It’s so cool that you now so much about the fastest animals and slowest

  • T-rex

    want it soooo bad

  • ;;k

    loveit

  • Amelia

    Ilove it so much

  • Alexander Lockyer

    National geographic is the best magazine series ever

  • Flower

    I looooove it

  • David

    Awesome Article!

  • julian

    I love it

  • Sophia

    Cool

  • Georgia

    This book is amazing!!

  • josephine

    wow

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