Forest Preserve District of DuPage County Ecologist Dan Thompson and natural-resource volunteers provide valuable insight into monitoring, surveying and collecting data about native amphibians in DuPage forest preserves.

The Calling Frog Survey Resources


PDFs to use for Visual Identification of Chicagoland herps:

Use these links for more information about frogs:

To report additional visual or audio observations of frogs and toads that were not observed during your official survey route (e.g. daytime observations, phenological observations such as first calling heard during the season, calls heard outside of your survey area while traveling) we recommend the following databases below. Please note that these programs require either photos where distinguishing characteristics of species are readily visible, or recordings in order to validate your observations.