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The Arthropod Story Table of Contents   

Arthropods: A success story

Almost any way you look at them, arthropods are successful:
  • They have been around for more than 500 million years and are still evolving.

  • They live on Earth in overwhelming numbers.

  • They have come in all shapes and sizes.

  • They have evolved to fill a variety of ecological niches — from tiny internal parasite to giant bird-eating predator.
But what is it about arthropods that has made them so successful? Let's begin our investigation by reviewing what an arthropod is.

Ecological niches

What is an arthropod?

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