Wasps are members of the scientific order Hymenoptera. With regards to population and diversity of species, only the Coleoptera (beetles) and Lepidoptera (butterflies and moths) are more numerous than bees and wasps.
The major difference between wasp and hornets is size and colour. Hornets are larger in size and have black and white rings.
Bees are fuzzy, flying insects with yellow and black stripes. There are two types of common bees are: the honeybee and the bumblebee.