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National Insect Week returns in 2020

British Arachnological Society

British Arachnological Society

The BAS is Britain's only charity devoted exclusively to the study and understanding of arachnids. Here you can find information on all things arachnological. Our emphasis is on British spiders but we also include other arachnids, particularly Harvestmen (opilionids), Pseudoscorpions and Scorpions

Did you know?

Fleeting mayflies

Adult mayflies may live for only a few days and females of Dolania americana live for just a few minutes

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