The Taxidermist is a Settlement Building that allows the player to craft new items out of beast parts and other items.
In order to create the item, the player must visit a non-hostile town during daylight, and have the materials and gold cost available. The materials will be removed and the item put in the player's inventory.
The recipes start invisible to the player until they own at least enough materials to craft a recipe. In that moment, it becomes visible.
If the player crafts any item, that particular recipe will be remembered and shown for the reminder of the playthrough, even if the player no longer has enough materials. In that case, the crafting recipe will be crossed out but will still inform the player of the materials (and amounts) they are missing.
See also:
NOTE: The Taxidermist is only available with the 'Beasts & Exploration' DLC.