Images are an aid to identification, showing different stages, states and views of the organisms.
Search the database or follow a taxonomic tree. Two major types of these directories exist, the kingdom-based directories and other types of directories. This is a collaboration of the Illinois State Academy of Science, the Illinois State Museum, the Weizmann Institute of Science, and the Henson Robinson Zoo. The material here is organized according to the biological principles of Taxonomy. Help build the largest human-edited directory on the web.