Detailed spatial data seems to require a CNDDB subscription.
You could put together quad level data (USGS 7.5 minute topographic quads) with this publicly available endpoint that lets you query what species are in a particular quad.
For example, for quad 3811957: https://apps.wildlife.ca.gov/bios/rest/Cnddb.ashx?o=cnddbQuickView&p=QuadSpecies&q=...
The data exists but it is unlikely to be open. From the U.S. Census Bureau (recall there is a crosswalk between SIC and NAICS codes)
Can I get a NAICS code or other statistical data for a specific company?
Title 13, U.S. Code, Section 9 (a) prohibits the U.S. Census
Bureau from releasing information on a specific business including