Education Home > Education The Natomas Basin Conservancy (TNBC) provides refuge and sanctuary for certain “Covered Species” displaced by urban development in the Natomas Basin of California. The species are listed in the Natomas Basin Habitat Conservation Plan (HCP). About NBHCP Learn about the Natomas Basin Habitat Conservation Plan (NBHCP). The NBHCP Species Meet the 22 plant and animal species that are “covered” by our work. Resources Research articles, education papers, and useful links for anyone interested in wildlife and the creation of habitat in the Natomas Basin of California. Downloads A selection of some of the Conservancy’s most requested PDFs.