This is a learning aid for identification of UK harvestmen. The main tool is a multi-access key: enter character values that match your specimen and see how that affects the likelihood that it matches each of the taxa in the knowledge-base. There are three different visualisations of this multi-access key - change between them using the drop down list below. You can also compare taxa directly with the side by side comparison visualisation. Click on any taxon name to see the character states and images recorded against it in the knowledge-base. Click on any character name to get help on it. For further help on the visualisations, first select the visualisation and then select the relevant Using element from the drop-down list. Or to see a brief video introduction to the visualisations, follow this link: (coming soon).