Amphibians and Reptiles in Ellis County: Texas Cooperative Wildlife Collection list of species found in the county.
Butterflies of Ellis County, Texas: Information about and pictures of all the known species of butterflies in the county.
Ellis County Watershed Template: From the Environmental Protection Agency; explores America's water resources with an emphasis on the quality of our Nation's water and features powerful searching, mapping, database querying, and informative hot links.
Ellis County Report: Pollution Locator: Map of the polluting sources, air quality ranking, and other pertinent environmental data for Ellis County, TX.