Wildlife Recreational Opportunities
- Las Palomas, Lower Rio Grande Valley recreation areas, with directions and a description of facilities.
- http://www.tpwd.state.tx.us/huntwild/hunt/wma/find_a_wma/list/index.phtml?id=47

The Friends of the Wildlife Corridor
- Organization to support wildlife and vegetation in the Lower Rio Grande Valley national wildlife refuges.
- http://www.corridorfriends.org/

David and Jan Dauphin's Website
- Butterfly photos and links to valley wildlife viewing areas and butterfly, birding, and odonate resources.
- http://www.thedauphins.net/

Valley Land Fund
- Mission is to preserve, enhance and expand the native wildlife habitat of the Rio Grande Valley. Information on membership, conservation projects, with photos and books.
- http://www.valleylandfund.com/

South Texas Butterfly Club
- Events, butterfly hotspots, checklists, field notes and photos, with articles and links.
- http://www.naba.org/chapters/nabast/

Valley Proud Environmental Council
- A Harlingen, Texas environmental organization that helps to preserve the natural beauty and environment of the Lower Rio Grande Valley and Mexico.
- http://www.valleyproud.org/

The Rio Grande - An American Heritage River
- Federal government information relating to the Rio Grande River's designation as an American Heritage River.
- http://www.epa.gov/rivers/98rivers/riogrande.html

Survey of the Lower Rio Grande & Associated Coastal Waters
- The purpose of the literature survey is to identify information relevant to freshwater and pollutant discharges from the Rio Grande and Arroyo Colorado and the potential and known impacts of these discharges within the project area, identify those areas w
- http://www.panam.edu/dept/csl/project2.htm

Riparian Vegetation of the Lower Rio Grande Valley
- Study is a joint project between the University of Texas Pan American, the University of Texas at Austin Center for Space Research, and the University of Texas - San Antonio.
- http://www.csr.utexas.edu/projects/rs/valley.html