Hornsby Bend Bird Observatory
- Cooperative partnership promoting the study and understanding of birds in Central Texas. Includes a schedule of projects, classes, and watching events, latest bird sightings and counts, and a guide to local and seasonal birds.
- http://www.hornsbybend.org/

Amphibians and Reptiles in Travis County
- Texas Cooperative Wildlife Collection list of species found in the county.
- http://wfscnet.tamu.edu/tcwc/checklist/TRAVI227.HTM