DUCKDATA
DUCKDATA provides a comprehensive bibliography of published literature on the ecology, conservation, and management of North 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.

Social Sciences in Forestry, 1985- (University of Minnesota)
Searchable by author, title and keyword, this database includes legislation, policy and planning, management, economic development, etc., as applied to general forestry, forest management, forest industries, forest goods and services. Most citations are annotated.

Species in Parks: Flora and Fauna Databases (Information Center for the Environment - ICE)
NPFauna and NPFlora are preliminary national PC-based databases of vertebrate animal and vascular plant occurrences in National Parks. These databases are currently under review by regional specialists and individual parks; until verified, they may not represent the current state of knowledge and should be considered provisional. Searchable by park, species names, and common names.

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

Monographs
Birders and U.S. Federal Laws (e-paper)
Environmental Treaty and Resource Indicators
Forest and Rangeland Birds of the United States (AH 688, 1991)
Guide to the Laws & Treaties of the United States for Protecting Migratory Birds
National Atlas of the United States of America
Occupational Outlook Handbook