Pro Peninsula
- A San Diego-based organization dedicated to the preservation of the unique natural environment on the Baja California peninsula. [English/Spanish]
- http://www.propeninsula.org/

Checklist of Reptiles from Baja California
- Compiled by the San Diego Museum of Natural History.
- http://www.sdnhm.org/research/herpetology/bajarept.html

Checklist of Spiders of Baja California
- Compiled by Jim Berrian for the San Diego Natural History Museum.
- http://www.sdnhm.org/research/entomology/bcspider.html

Geologic Provinces of Baja California
- Descriptions of geologic provinces and history, from Fred Metcalf's Baja Information Pages.
- http://math.ucr.edu/ftm/bajaPages/Geology.html

SeaWatch
- Environmental information and an action plan to help revitalize the Sea of Cortez.
- http://www.seawatch.org/