Dendrome Project (Institute of Forest Genetics)
Dendrome is a collection of forest tree genome databases and other forest genetic information resources for the international forest genetics community. It comprises genome databases for major crop and forest species. The TreeGenes database is searchable. Genome resources include lists of genetic maps, genetic software, and protocol databases. 

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. 

eFloras.org
Detailed descriptions of plants in a database searchable by taxa.

IUCN Red List of Threatened Species
The IUCN Red List of Threatened Species provides taxonomic, conservation status and distribution information on taxa that have been evaluated using the IUCN Red List Categories (designed to determine the relative risk of extinction). The main purpose of the IUCN Red List is to catalogue and highlight those taxa that are facing a higher risk of global extinction. The IUCN Red List also includes information on taxa that are categorized as Extinct or Extinct in the Wild; or taxa that cannot be evaluated because of insufficient information; and on Lower Risk taxa which are either close to meeting the threatened thresholds or that would be threatened were it not for an ongoing taxon-specific conservation programme.

Social Sciences in Forestry Database (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 & 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. 

Species Information (Endangered Species Program, US Fish & Wildlife Service)
Listings of threatened and endangered species in the United States and abroad.

Trail Planning, Construction, & Maintenance Database (University of Minnesota)
Searchable by author, title and keyword, this database indexes publications relating to the planning, design, construction, and maintenance of all types of trails, including trail use studies. Most citations are annotated. 

Tropical Forest Conservation & Development Forestry Database (University of Minnesota)
Searchable by author, title and keyword, this database pertains to tropical forest resources, deforestation, conservation, indigenous peoples, management, policy, trade and industrial development, nontimber forest products, research, education, training, and history. Most citations are annotated. 

Urban Forestry Database (University of Minnesota)
Searchable by author, title and keyword, this database includes information on the history, and benefits, of urban forestry, urban forest legislation, selection and planting of trees, urban forest maintenance, planning and management, and urban forestry programs. Most citations are annotated. 

Directories
National Park, Preserve, Forest & Wilderness Directory

Monographs
Environmental Treaty & Resource Indicators (ENTRI) Treaty Texts
Forest & Tree Health Publications and Fact Sheets
National Atlas of the United States of America
National List of Vascular Plant Species that Occur in Wetlands
Occupational Outlook Handbook
Silva by John Evelyn (1664)
Silvics of North America by USDA Forest Service (Agriculture Handbook 654) (1965/1990)
State of the World's Forests (FAO)
World Factbook (CIA)