Wednesday, 3 December 2014


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Creepy crawlies fascinate me - it must be all those legs.  Except for spiders as they are pure evil. OK, they do a great job eating all the flies but still, no need for them to chase me around the house!

Insects and spiders share some similarities such as an exoskeleton and their symmetry. This is because they are both members of the phylum Arthropoda (meaning jointed limb). 

here are over one million Arthropoda species within the subphylum groups of Uniramia, Chelicerata, Crustacea and Trilobita. These include insects, arachnids, horseshoe crabs, crustaceans and trilobites.

Arthropods are bilaterally symmetrical and each body segment may bear a pair of jointed appendages. They are covered by an hard exoskeleton, which serves as both armour and a surface for muscle attachment.   

The phylum includes carnivores, herbivores, omnivores, detritus feeders, filter feeders, and parasites in nearly all environments, both aquatic and terrestrial. 


  • Insects belong to the group Insecta. This group Includes flies, crickets, mosquitoes, beetles, butterflies, and bees. 
  • Insects have six legs
  • They have three body segments - a head, thorax and abdomen
  • Eat a variety of  food including paper, plastic
  • Have antennae, which they use to smell
  • Usually have two pairs of wings
  • They have two, compound, eyes


  • Spiders belong to a group of arthropods called arachnids, along with ticks, mites, and scorpions.
  • Spiders have eight legs
  • They have two body sections - a cephalothorax and an abdomen
  • Eat mostly insects but can eat small birds, frogs or mice.
  • Do not have antennae but have bristles on their legs that sense vibrations
  • Spiders never have wings
  • Spiders have two poison fangs and two feelers
  • They produce silk used to make nests, cocoons, or webs for trapping insects. 
  • They have multiple eyes, usually eight
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