There are 62,000 acres of land managed by Midpen, with thousands of species. Much of the information about these plants and animals can be found on iNaturalist.org, a web site with a downloadable mobile device app, which brings naturalists together to identify and document their field notes. Check out the field guides for Rancho San Antonio and Russian Ridge and document your own sightings!

See for yourself—and tell others—what amazing plants and animals are on Midpen preserves by joining the Midpen Biodiversity Index project and sharing your observations. You observations will help biologists at Midpen by helping to understand what organisms occur, and where, and gaining a greater knowledge of the diverse ecosystems found throughout the peninsula.