
The Irvine Ranch Natural Landmarks is home to diverse native habitats, iconic geological formations, and rare animal species. Many threatened or endangered plants and animals and species of special concern depend on the natural resources of the open space to survive. For example, the coastal cactus wren, a bird species of special concern, depends almost exclusively on coastal cholla and coastal prickly pear cactus found in coastal sage scrub habitat, and the entire world’s population of California gnatcatchers – federally listed as a threatened species in 1993 – lives only in Baja California and coastal Southern California, including on the Landmarks. Restoring and enhancing native habitat on the open space directly helps protect local wildlife, and ongoing support from the public is crucial to these stewardship efforts.