Holes Sites
https://www.columbuszoo.org/guide/index.html#type=Reptile
https://www.columbuszoo.org/guide/index.html#type=Amphibian
http://nationalzoo.si.edu/Animals/ReptilesAmphibians/Facts/FactSheets/default.cfm
http://www.werc.usgs.gov/project.aspx?projectid=75