Categories and subcategories are organised in a tree diagram in alphabetical order. A category can contain subcategories. Each branch of the tree diagram represents a category or subcategory. The branches containing subcategories can be opened or closed clicking on +/-. Opening several branches at the same time can be inconvenient or confusing. To make a search, click on the title of any of the branches. The further the root is placed, the more precise the search will be.

  (*) Although the scientific names and families of the species are kept up-to-date in the photo stock database, in order to facilitate the search for the user unfamiliar with the taxonomy, the clasificacion tree does not always correspond to the latest scientific updates.