Spiders are easily distinguished from other arthropods as they have 8 legs, 2 main body parts and no antennae. You are more likely to encounter one in your house in autumn as this is the breeding season for many species and males often wander in, searching for a mate. Most large or unfamiliar-looking spiders in the UK are actually common established species.
Below are some of the spiders our Identification and Advisory Service team is most often asked about. Select one to find out more, including identification clues.
If you want help identifying a spider but can't see it in this gallery, you can post your own image and ask our experts and enthusiasts in the Bug forum.