Bees and wasps are generally active in summers causing great nuisance. Bees have furry body and size ranges between 1.3 cm to 2.5 cm. Whereas, wasps have little or not hair and are of 1.9 to 3.5 cm in size. They live in colonies and sting people invading their nests that creates a lot of pain. Some of the bees and wasps species are more aggressive. They feed on insects such as caterpillars, flies and other pests. The best time to exterminate them is at night when they are less active.