 Climate change and the introduction of exotic species that compete with the indigenous ones put the native species under stress, and as a result they are more likely to succumb to pathogens and parasites.As of 2017, at least 66 insect species extinctions had been recorded in the previous 500 years, which generally occurred on oceanic islands.For 203 insect species that had IUCN-documented population trends in 2013, 33% were in decline with variation in documented species across orders.