Arachnida (spiders etc.) c550 species
Crustacea (woodlice, water fleas, etc.) c250 species
Mollusca (snails, slugs, etc.) c170 species
Coleoptera (beetles) c3000 species
Diptera (flies) c4000 species
Hymenoptera [excluding parasitic wasps] (bees, wasps, sawflies) c750 species
Hemiptera (bugs, leafhoppers, aphids, etc.) c1200 species
Lepidoptera (butterflies, moths) c1800 species
Trichoptera (caddisflies) c160 species