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Resources from the Austin Ecological Services Field Office.

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Photo of a captive held Houston Toad in its enclosure staring through the clear plastic walls at the camera
The documents below [Updated September 21, 2020] identify survey methods and reporting guidelines to be used for conducting presence/absence surveys for Houston toads (Bufo houstonensis) under a section 10(a)(1)(A) scientific research and recovery permit. Sound clips of Houston Toad are saved as...
Electromag Cave in Williamson County, Texas
Sixteen species of karst invertebrates are listed as endangered in central Texas. The following documents and links are provided to help you understand the life history and federal listing status of these species.
Photo of a fourteen Texas fatmucket mussels resting above a sand and algae streambed on a sunny day
Two species freshwater mussels are currently listed as endangered in Texas. An additional 8 species have been proposed to receive endangered species status in the state and 2 more are proposed to receive threatened status. The following documents and links are provided to help you understand the...
a pale peach colored salamander on a black
Resources for permittees who conduct presence/absence surveys and collections of listed salamanders of central Texas.