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Amphibians and Reptiles in Frio County
http://wfscnet.tamu.edu/tcwc/checklist/FRIO082.HTM
Texas Cooperative Wildlife Collection list of species found in the county.
Butterflies of Frio County, Texas
http://www.npwrc.usgs.gov/resource/distr/lepid/bflyusa/chklist/states/counties/tx_163.htm
Information about and pictures of all the known species of butterflies in the county.
Moths of Frio County, Texas
http://www.npwrc.usgs.gov/resource/distr/lepid/moths/chklist/states/counties/tx_163.htm
By the Northern Prairie Wildlife Research Center.