Arroyo Colorado Audubon Society

Bird Watchers Digest

City of Weslaco

Eagle Optics

Estero Llano Grande State Park

Friends of Santa Ana

Frontera Audubon

Green Hearts

Gulf Coast Bird Observatory

Laguna Atascosa NWR

Lower Rio Grande NWR

 NABA-SoTX

Native Plants by Christina Mild

Naturally Curious

Rio Grande Delta Audubon Society

South Texas Nature COOP

Richard Moore Outdoors Videos

Ruth Hoyt's Nature Photography

Rio Grande Valley Butterfly Trail

Ducks Unlimited

Rio Bravo Nature Center, Eagle Pass, TX

Rio Grande Nature Coalition

Rio Grande Valley Master Naturalist

Santa Ana National Wildlife Refuge

The Lens and the Land

The Native Plant Project - Native Plants for the LRGV

The Native Plant Society of Texas

The Nature Writers of Texas

The Valley Land Fund

US Geological Survey Bibliography for the LRGV