Helpful sites::

Aggie Horticulture

Austin Bug Collection

Bat Consevation International

BeeWeaver Apiaries

BugGuide

Butterflies and Moths of North America

Center for Biological Diversity

City of Austin Grow Green Program (as part of Watershed Protection/Education)   

Lady Bird Johnson Wildflower Center

Merlin Tuttle’s Bat Conservation

Monarch Watch

National Butterfly Center

National Wildlife Federation

Pollinator Partnership

Texas Invasives.org

Texas Master Naturalist Program

Travis County Master Gardeners Association  

Local (in or near Austin, Tx)  nurseries-listed alphabetically:

Barton Springs Nursery-Open Mon-Sat 9-6  Sun 10-6
3601 Bee Caves Road
Austin, TX 78746    (512)328-6655 

Big Red Sun-Open Mon,Tue by appointment  Wed-Sat 10-6  Sun 11-5
1311 East Cesar Chavez Street
Austin, TX 78702    (512)480-0688  

East Austin Succulents-Open Everyday 10-5
801 Tillery Street
Austin, TX 78702 (512)947-6531

Great Outdoors-Open Mon-Sat 9-6  Sun 10-6
2730 Congress Ave S
Austin, TX 78704 (512)448-2992

Greensleeves Nursery 
601 West Pecan Street
Pflugerville, Tx 78660    (512)251-3262

Hill Country Water Gardens and Nursery-Open Mon-Sat 9-5  Sun 11-5
1407 N. Bell Blvd (Hwy 183 just North of RM 1431)
Cedar Park, TX 78613    (512)260-5050

Leaf Landscape Supply-Open Mon-Sat 8-5
5700 W Hwy-290
Austin, TX 78735 (512)288-5900

Natural Gardener-Open Mon-Sat 8-6  Sun 10-5 (Hours change seasonally)
8648 Old Bee Caves Road
Austin, Texas 78735   (512)288-6113

Shoal Creek Nursery-Open daily 8:30-6
2710 Hancock Drive
Austin, TX 78731-5004    (512)458-5909

Online, not local to Austin::

Native American Seed

Prairie Moon Nursery

Reforestation, Nurseries, & Genetics Resources