REPORT | Spiders eat astronomical numbers of insects

A new study reveals some stunning estimates about just how much the world’s spiders eat annually: between 400 and 800 million tons of insects, springtails, and other invertebrates. In the process, these eight-legged carnivores play an important role to keep countless insect pests, especially in forests and grassland areas, in check.

This is according to the findings of Martin Nyffeler of the University of Basel in Switzerland and Klaus Birkhofer of Lund University in Sweden and the Brandenburg University of Technology Cottbus-Senftenberg in Germany, published in Springer’s journal The Science of Nature.

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