Benny J. Simpson’s Texas Native Shrubs
Benny J. Simpson’s Texas Native Trees
Botanical Research Institute of Texas
Dallas County Lepidopterists’ Society
Dallas (local) Sunrise & Sunset Calculator
Environmental Protection Agency
How to choose your electricity supplier
ITIS – Integrated Taxonomic Information System
Lady Bird Johnson Wildflower Center
Native Prairies Association of Texas
Natural History of North Central Texas
The Nature Conservancy in Texas
Preservation Society for Spring Creek Forest
Texas Environmental Profiles Maps
Texas Forest A&M Service – Trees of Texas
Texas Master Naturalist (State) Website
Texas Parks and Wildlife Department
Texas Society for Ecological Restoration