 | American Botanical Council - Listing of the services and publications of the ABC. Includes a number of publications and samples of medicinal plant monographs, a glossary, and resource lists.
 | Austin Astronomical Society - A non-profit organization for anyone interested in astronomy or space sciences.
 | Austin Bonsai Society - Calendar of events, local bonsai resources, membership information and application.
 | Austin Cactus and Succulent Society - Includes meeting and membership information.
 | Austin Duck Police - Offers resources for the rescue and care of birds, ducks, and pigeons. Also includes information about vegan diet.
 | Austin Fern and Cycad Society - Includes meeting and membership information.
 | Austin Herb Society - Encourages the growth and use of herbs, educates the public regarding the benefits of herbs, and provides support to community gardens and libraries. Site includes newsletters, calendar of events, and a list of sponsors.
 | Austin Koi Club - Includes a calendar of events and membership information.
 | Austin Metro Trails and Greenways - Committed to the development of a comprehensive regional system of greenways and trails in the area. Site includes their goals, a list of projects, trail and greenway facts, and a membership form.
 | Austin Nature and Science Center - Acts as a living museum to increase knowledge, awareness, and appreciation of the area's natural environment and its connection to other world ecosystems. Includes a list of programs, schedule of exhibits, and resources for teachers.
 | Austin Organic Gardeners - Membership and meeting schedule, listing of local farmer's markets and growers, Austin area planting guide, and organic gardening news and information.
 | Austin Pond Society - Includes a list of Koi and pond clubs around the world. Also includes photos, a forum, calendar of events, and membership information.
 | The Austin Sanctuary - Provides an outdoor sanctuary for exotic birds. Site lists educational programs, volunteer opportunities, and birds.
 | Austin Sierra Club - Information about membership and meetings, trips, and workshops. Includes an archive of newsletter articles and a section for singles.
 | Bat Conservation International - Austin-based group whose mission is to protect and restore bats and their habitats worldwide. Includes information about education, conservation efforts, articles, projects, places to see bats, and the "Bat Cam."
 | Bill Hicks Foundation for Wildlife Rehabilitation - Rescues orphaned and injured wildlife in the Texas Hill Country. Includes photos of Hicks and wildlife, video clips, and an online store with donation form.
 | Bob's Backyard Squirrel Cam - Includes live cam and photos of squirrels, birds, and reptiles.
 | Bull Creek Foundation - Promotes a balance between nature, recreation, and sustainable economic development within the Bull Creek watershed. Includes information about trails, water quality, and educational and volunteer events.
 | Capital Area Beekeepers - Includes information about all kinds of bees and why they form an integral part of the environment. Also includes information about their annual workshop.
 | Capital of Texas Aquarium - An overview of the prospective Austin aquarium, including volunteer and donation specifics.
 | Central Texas Association of Wild Plant Studies - Schedule of current events including meetings, workshops, and field trips.
 | Central Texas Paleontological Society - A scientific, non-profit, community-based organization devoted to the study of fossils. Site includes contact information and meeting times.
 | City of Austin - Nature Preserves - Sanctuaries for native plants, native animals, and unique natural features providing educational and scientific opportunities. Includes maps to preserves, photos, and volunteer opportunities.
 | City of Austin Oak Wilt Suppression Program - Information on the oak wilt disease, and its control in the city.
 | Clean Air Force - Coalition working to increase community awareness of air quality issues. Site includes a citizen's guide to cleaner air, a list of programs, calendar of meetings and events, and links to daily ozone readings.
 | The Green Corn Project - Non-profit organization that builds organic food gardens at the homes of Austin residents. Includes newsletters, how to get involved, and a list of resources.
 | Hornsby Bend - Recycling center for sewage and yard trimmings, popular birdwatching site, demonstration site for green building, and a research site for riparian ecology, biosolids, and the soil food web.
 | Keep Austin Beautiful - Empowers citizens to take personal responsibility for enhancing the community's environment. Includes a calendar of events, a list of programs, trash facts, FAQ, donation information, and how to get involved.
 | Lady Bird Johnson Wildflower Center - Publications, native plant information, and schedules of events and ongoing educational programs.
 | Men's Garden Club of Austin - Primarily a charitable, scientific, and educational organization. Site includes meeting schedule, a list of activities, and membership information.
 | Native Plant Society of Texas: Austin Chapter - Promotes the conservation, research, and utilization of the native plants and plant habitats of Texas through education, outreach, and example. Includes a list of projects, mailing list, volunteer opportunities, and a mailing list.
 | Plateau Integrated Land and Wildlife Management - Works to preserve the natural environment by managing private property for native wildlife. Includes information about requirements and tax benefits, FAQ, and profiles of the staff.
 | Save Barton Creek Association - Promoting public awareness of Barton Springs and Barton Creek via scientific and environmental information.
 | Save Our Springs Alliance - News, legal documents, and updates on this ongoing environmental protection project.
 | Scenic Austin - Non-profit organization dedicated to preserving and enhancing the visual environment of Austin and its surroundings.
 | South Austin Community Garden - Located in South Austin at the Salvation Army Community Center. Site includes map, meeting times, and an overview of the garden's projects and organic policy.
 | Spa Waters of Texas - Promotes educational forums, presents historical research, and provides consultation to bring about a revival of authentic spa lifestyle. Site includes recommended reading and consulting information.
 | Sustainable Food Center - Local organic gardening news, educational programs, composting classes, volunteer possibilities and gardening tips.
 | Tree Folks - Promotes the renewal, restoration, and care of urban forest through public tree plantings and education. Includes a planting guide, a list of projects, and membership information.
 | Useful Wild Plants - Organization working on an encyclopedia of botany and requesting help from the public. Includes membership information, a quiz about plants, volunteer opportunities, and a newsletter.
 | Wild Basin Wilderness Preserve - Mission statement, trail map, schedule of events, plus volunteer and environmental education program information.
 | Zilker Botanical Garden - Schedules and information about tours, projects, and education programs, as well as photo gallery and searchable type specimen register.
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