C:
Central Southwest Gulf Coast Information Node - Gateway to biological information for Arkansas, Louisiana, Oklahoma, Texas, and the Gulf of Mexico, including the coastal areas of Mississippi, Alabama, and Florida. [Department of the Interior, U.S. Geological Survey (USGS), National Biological Information Infrastructure]

H:
Habitats - Resources related to Earth is host to desert, forest, marine, montane, prairie, tundra and wetland habitats, each of which supports its own specialized plant, animal, and microbial species assemblages. [Department of the Interior, U.S. Geological Survey (USGS), National Biological Information Infrastructure]

N:
National River Restoration Science Synthesis - A scientific synthesis of river restoration projects, with a searchable database. [Department of the Interior, U.S. Geological Survey (USGS), National Biological Information Infrastructure]

National Wetlands Inventory Center (NWI) - Generates information about the characteristics, extent and status of the Nation's wetlands and deepwater habitats [Department of the Interior, U.S. Fish and Wildlife Service]

National Wetlands Research Center, Lafayette, Louisiana - Homepage with links to general information, staff, issues and capabilities, library, publications and data [Department of the Interior, U.S. Geological Survey (USGS)]