Although some species of wasps may be very bothersome to people, the majority of the species are solitary and non-stinging. Additionally, wasps are extremely important in the control of other pest insects because almost all pests are the food source for at least one species of wasp. Without the presence of wasps, this natural insect control would not be possible. Although wasps are helpful to the environment, they can also be dangerous when encountering people. If their nest is disturbed, wasps become very defensive and will swarm and sting in order to protect the nest.