This is a good article. Follow the link for more information. Ideal protein phase 2 pdf article is about the insects. These insects are usually solitary, but under certain circumstances they become more abundant and change their behaviour and habits, becoming gregarious.
In the solitary phase, these grasshoppers are innocuous, their numbers are low, and they do not pose a major economic threat to agriculture. Swarming behaviour has decreased in the 20th century, but despite modern surveillance and control methods, the potential for swarms to form is still present, and when suitable climatic conditions occur and vigilance lapses, plagues can still occur. Locusts are large insects and convenient for use in research and the study of zoology in the classroom. Swarming behaviour is a response to overcrowding. Increased tactile stimulation of the hind legs causes an increase in levels of serotonin. This causes the locust to change colour, eat much more, and breed much more easily.