This online encyclopedia is restricted to ACC students and staff. If you're off campus, you will use your ACC eID to access. Huge encyclopedia covers the most basic to the most advanced nonhuman animals. In print this is 17 volumes. Use the table of contents or search for specific topics.
(If you need articles on these topics, use the "Finding Biology Articles" tab, above)
This site describes itself as "an ambitious project to organize and make available via the Internet virtually all information about life present on Earth." They plan to have a page on each organism on earth.
Considered the most complete and up-to-date list of threatened plants and animals. Entries are rated by how endangered they are. From the International Union for Conservation of Nature and Natural Resources. (The above entry is better for a general overview of the topic.)