DUCKDATA
DUCKDATA provides a comprehensive bibliography of published literature on the ecology, conservation, and management ofNorth American waterfowl and their wetland habitats. The database is searchable, and can be downloaded in its entirety.

IUCN Red List of Threatened Species
Provides taxonomic, conservation status and distribution  information to highlight those taxa that are facing a higher risk of global extinction. The Red List also includes information on taxa that are categorized as Extinct or Extinct in the Wild; on taxa that cannot be evaluated because of insufficient information; and on Lower Risk taxa which are close to meeting the threatened thresholds.

US Fish & Wildlife Service Online Databases
Several databases that cover relevant specific species, federal documents, and environmental issues.

Definitions
Endangered Species Glossary (US Fish & Wildlife, Region 3)
GIS Dictionary (ESRI)
Glossary of Water-Use Terminology (USGS)
Water Science Glossary of Terms (USGS)

Directories
National Park, Preserve, Forest and Wilderness Directory

Full-Text Sources
Journals
Journal of Extension, v25 (Fall 1987- )

Monographs
Birders and U.S. Federal Laws (e-paper)
Environmental Treaty and Resource Indicators (ENTRI) Treaty Texts
Guide to the Laws and Treaties of the United States for Protecting Migratory Birds
National Atlas of the United States of America
National List of Vascular Plant Species that Occur in Wetlands
Occupational Outlook Handbook