Amphibians and Reptiles in Hays County
Texas Cooperative Wildlife Collection list of species found in the county.
Butterflies of Hays County, Texas
Information about and pictures of all the known species of butterflies in the county.
Hays Trinity Groundwater Conservation District
Works to conserve, preserve, recharge and prevent waste of groundwater within western Hays County. Information on board meetings, rules, and well monitoring, with downloadable forms.