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The article focuses on a 10-year study which found that more than 3.3 trillion insects migrate high above southern Great Britain from 2000-2009 especially in spring and fall. Topics covered include the net movement of bugs by tons of biomass that travel overhead at heights greater than about 500 feet, the overall direction of insect flight, and the active choices that the insects make about when and how to use the winds to migrate.

The article discusses research which found that about 3.5 trillion arthropods migrate over southern Great Britain annually. It references a study by Jason Chapman et al and published in the December 23, 2016 of "Science." Topics covered include the findings of an analysis of decade of data from special entomological radar and net sweeps, the suggestion that more species may have specialized biology for seasonal migrations, and the idea that a lot of arthropods migrate overhead.