Amphibians and Reptiles in Frio County - Texas Cooperative Wildlife Collection list of species found in the county. wfscnet.tamu.edu/tcwc/checklist/FRIO082.HTM
Butterflies of Frio County, Texas - Information about and pictures of all the known species of butterflies in the county. www.npwrc.usgs.gov/resource/DISTR/LEPID/BFLYUSA/chklist/states/counties/tx_163.htm
Frio Co. Genealogy - These pages contain some Frio County Texas genealogy information. www.historicdistrict.com/Genealogy/Frio/frio.htm
Frio County Courthouse - Includes photographs and information. freepages.history.rootsweb.com/~southernheritage/frio.htm
Frio County QuickFacts from the US Census Bureau - Population, demographic, and housing information from the 1990 census. Link to Tiger map of the county. quickfacts.census.gov/cgi-bin/county?cnty=48163
Handbook of Texas Online - Current and historical information about Frio County. www.tsha.utexas.edu/handbook/online/articles/view/FF/hcf10.html
Moths of Frio County, Texas - By the Northern Prairie Wildlife Research Center. www.npwrc.usgs.gov/resource/distr/lepid/moths/chklist/states/counties/tx_163.htm
