![]() ![]() Our analysis estimates a seasonal decline of 76%, and mid-summer decline of 82% in flying insect biomass over the 27 years of study. ![]() Here, we used a standardized protocol to measure total insect biomass using Malaise traps, deployed over 27 years in 63 nature protection areas in Germany (96 unique location-year combinations) to infer on the status and trend of local entomofauna. Our understanding of the extent and underlying causes of this decline is based on the abundance of single species or taxonomic groups only, rather than changes in insect biomass which is more relevant for ecological functioning. ![]() Loss of insect diversity and abundance is expected to provoke cascading effects on food webs and to jeopardize ecosystem services. Global declines in insects have sparked wide interest among scientists, politicians, and the general public. ![]()
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