Point Reyes National Seashore contains unique elements of biological and historical interest in a spectacularly scenic panorama of thunderous ocean breakers, open grasslands, bushy hillsides and forested ridges. Native land mammals number about 37 species and marine mammals augment this total by another dozen species. The biological diversity stems from a favorable location in the middle of California and the natural occurrence of many distinct habitats. Nearly 20% of the State's flowering plant species are represented on the peninsula and over 45% of the bird species in North America have been sighted.