Botany
- Botany Glossary Online.
- Bryological GlossaryIndex Herbariorum.
- Dictionary of Common Names.
- Index Nominum Genericorum.
- Plants Database.
- Virtual Library of Botany.
- Economic Botany Bibliographic Database.
- International Plant Names Index.
- Index of Botanical Publications.
- The Tree of Life.
- Web Project.
- Nomenclatural Glossary for Zoology.
- Nature Serve Explorer.
- Species 2000.
- Amphibian Species of the World: An Online Reference.
- Zoonomen: Zoological Nomenclature Resource.
- Audubon Society Bird esources.