The number of insects fell by a record 75-82%.
Many native tribes also consider insects quite important.
News reported that while other studies have pointed out declines in bumblebees in the United Kingdom and the monarch butterfly in the United States, this study appeared to go further, noting a sharp population decline beyond those species.
A fresh call by the Christian conservation charity for more to consider joining their "eco churches" initiative was prompted after a new study concluded flying insect populations have been "decimated" in Germany.
"This is the first study that looked into the total biomass of flying insects and it confirms our worries".
And they said there was an urgent need to uncover the causes and extent of the decline in all airborne insects. Those were deployed in 63 nature protection areas in Germany over the course of 27 years. "The big surprise is that it is also happening in adjacent nature reserves". "This must be a decline in the entire spectrum of flying insects, from primary consumers like leaf-chewing bugs, all the way to parasitoid wasps and large bumble bees". The results, according to Hallmann and de Kroon, are likely to be valid for major parts of Western Europe and other populated regions in the world where small nature reserves are locked in an agricultural landscape. In order to minimize the impact on flying insect communities, the team did not investigate each location annually.
Dave Goulson, one of the lead researchers for the study, blames humans for the decline seen by scientists for the past 27 years, which has be accelerated by climate change, pesticides, and agricultural practices, NBC News said.
For Nocera, one follow up study would be to assess the trend in forests and wetland areas, which are among the most productive areas for insect populations.
Countless insects living in every corner of the world, prevents to conduct such calculations directly, so scientists conducting them, installing special traps in the national parks and counting the number of insects that fall in them for a certain period of time.
The scientists are now investigating sites in the Netherlands to determine better how pesticides are impacting insect populations, and how those losses are affecting insectivorous bird species.