Spiders are amazing creatures and there are thousands of identified species in the world. In the UK alone, there are over 600 species across 37 families. Many people will commonly refer to spiders as ‘insects’. Although spiders, like insects, are invertebrates and belong to the phylum Arthropoda, they do not belong to the same class. Insects are part of the Insecta class, whereas spiders – similarly to scorpions, mites and ticks – belong to the class Arachnida.