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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?

Ant supercolonies

Ant supercolonies can be made up of thousands of nests and hundreds of thousands of workers.

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