3 links
Amphibians and Reptiles in Collin County
fscnet.tamu.edu
Texas Cooperative Wildlife Collection list of species found in the county.
Collin County Law Enforcement Academy
cclea.org
General information plus class schedules and on-line registration.
Prairie and Timbers Audubon Society
prairieandtimbers.org
Chapter of the National Audubon Society, located in McKinney, Texas.