The insect apocalypse is not here but there are reasons for concern

Over the past few years, scores of scientific studies have found declines in different measures of insect life and health, all of the order of 50-80%, in areas as far apart as Germany, California and Borneo. This collection method records the total biomass of insects in the trap, a good measure of the amount of food available to birds and other predators but which tells you nothing about which species are being caught or how many of each there are. Early this year, Francisco Sánchez-Bayo of the University of Sydney and Kris Wyckhuys of the University of Queensland, reviewed all the studies they could find mentioning insect decline.

Source: www.economist.com